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llvm / llvm-project / llvm / e8fab0892f0fec0530fda89944e738522b340512 / . / test / CodeGen / RISCV / sextw-removal.ll
blob: f9ffb6603fa0e4bf5a56ded46869793448378c9d [file] [log] [blame]
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=riscv64 -mattr=+m,+f,+zknh -target-abi=lp64f \
; RUN: | FileCheck %s --check-prefixes=CHECK,RV64I
; RUN: llc < %s -mtriple=riscv64 -mattr=+m,+zba,+zbb,+f,+zknh -target-abi=lp64f \
; RUN: | FileCheck %s --check-prefixes=CHECK,RV64ZBB
; RUN: llc < %s -mtriple=riscv64 -mattr=+m,+zba,+zbb,+f,+zknh -target-abi=lp64f \
; RUN: -riscv-disable-sextw-removal | FileCheck %s --check-prefix=NOREMOVAL
define void @test1(i32 signext %arg, i32 signext %arg1) nounwind {
; CHECK-LABEL: test1:
; CHECK: # %bb.0: # %bb
; CHECK-NEXT: addi sp, sp, -32
; CHECK-NEXT: sd ra, 24(sp) # 8-byte Folded Spill
; CHECK-NEXT: sd s0, 16(sp) # 8-byte Folded Spill
; CHECK-NEXT: sd s1, 8(sp) # 8-byte Folded Spill
; CHECK-NEXT: mv s0, a1
; CHECK-NEXT: sraw s1, a0, a1
; CHECK-NEXT: .LBB0_1: # %bb2
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: mv a0, s1
; CHECK-NEXT: call bar@plt
; CHECK-NEXT: sllw s1, s1, s0
; CHECK-NEXT: bnez a0, .LBB0_1
; CHECK-NEXT: # %bb.2: # %bb7
; CHECK-NEXT: ld ra, 24(sp) # 8-byte Folded Reload
; CHECK-NEXT: ld s0, 16(sp) # 8-byte Folded Reload
; CHECK-NEXT: ld s1, 8(sp) # 8-byte Folded Reload
; CHECK-NEXT: addi sp, sp, 32
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test1:
; NOREMOVAL: # %bb.0: # %bb
; NOREMOVAL-NEXT: addi sp, sp, -32
; NOREMOVAL-NEXT: sd ra, 24(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: sd s0, 16(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: sd s1, 8(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: mv s0, a1
; NOREMOVAL-NEXT: sraw s1, a0, a1
; NOREMOVAL-NEXT: .LBB0_1: # %bb2
; NOREMOVAL-NEXT: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: sext.w a0, s1
; NOREMOVAL-NEXT: call bar@plt
; NOREMOVAL-NEXT: sllw s1, s1, s0
; NOREMOVAL-NEXT: bnez a0, .LBB0_1
; NOREMOVAL-NEXT: # %bb.2: # %bb7
; NOREMOVAL-NEXT: ld ra, 24(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: ld s0, 16(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: ld s1, 8(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: addi sp, sp, 32
; NOREMOVAL-NEXT: ret
bb:
%i = ashr i32 %arg, %arg1
br label %bb2
bb2: ; preds = %bb2, %bb
%i3 = phi i32 [ %i, %bb ], [ %i5, %bb2 ]
%i4 = tail call signext i32 @bar(i32 signext %i3)
%i5 = shl i32 %i3, %arg1
%i6 = icmp eq i32 %i4, 0
br i1 %i6, label %bb7, label %bb2
bb7: ; preds = %bb2
ret void
}
declare signext i32 @bar(i32 signext)
; The load here was previously an aext load, but this has since been changed
; to a signext load allowing us to remove a sext.w before isel. Thus we get
; the same result with or without the sext.w removal pass.
; Test has been left for coverage purposes.
define signext i32 @test2(ptr %p, i32 signext %b) nounwind {
; RV64I-LABEL: test2:
; RV64I: # %bb.0:
; RV64I-NEXT: lw a0, 0(a0)
; RV64I-NEXT: li a2, 1
; RV64I-NEXT: sllw a1, a2, a1
; RV64I-NEXT: not a1, a1
; RV64I-NEXT: and a0, a1, a0
; RV64I-NEXT: ret
;
; RV64ZBB-LABEL: test2:
; RV64ZBB: # %bb.0:
; RV64ZBB-NEXT: lw a0, 0(a0)
; RV64ZBB-NEXT: li a2, -2
; RV64ZBB-NEXT: rolw a1, a2, a1
; RV64ZBB-NEXT: and a0, a1, a0
; RV64ZBB-NEXT: ret
;
; NOREMOVAL-LABEL: test2:
; NOREMOVAL: # %bb.0:
; NOREMOVAL-NEXT: lw a0, 0(a0)
; NOREMOVAL-NEXT: li a2, -2
; NOREMOVAL-NEXT: rolw a1, a2, a1
; NOREMOVAL-NEXT: and a0, a1, a0
; NOREMOVAL-NEXT: ret
%a = load i32, ptr %p
%shl = shl i32 1, %b
%neg = xor i32 %shl, -1
%and1 = and i32 %neg, %a
ret i32 %and1
}
define signext i32 @test3(ptr %p, i32 signext %b) nounwind {
; RV64I-LABEL: test3:
; RV64I: # %bb.0:
; RV64I-NEXT: lw a0, 0(a0)
; RV64I-NEXT: li a2, 1
; RV64I-NEXT: sllw a1, a2, a1
; RV64I-NEXT: not a1, a1
; RV64I-NEXT: or a0, a1, a0
; RV64I-NEXT: ret
;
; RV64ZBB-LABEL: test3:
; RV64ZBB: # %bb.0:
; RV64ZBB-NEXT: lw a0, 0(a0)
; RV64ZBB-NEXT: li a2, -2
; RV64ZBB-NEXT: rolw a1, a2, a1
; RV64ZBB-NEXT: or a0, a1, a0
; RV64ZBB-NEXT: ret
;
; NOREMOVAL-LABEL: test3:
; NOREMOVAL: # %bb.0:
; NOREMOVAL-NEXT: lw a0, 0(a0)
; NOREMOVAL-NEXT: li a2, -2
; NOREMOVAL-NEXT: rolw a1, a2, a1
; NOREMOVAL-NEXT: or a0, a1, a0
; NOREMOVAL-NEXT: ret
%a = load i32, ptr %p
%shl = shl i32 1, %b
%neg = xor i32 %shl, -1
%and1 = or i32 %neg, %a
ret i32 %and1
}
define signext i32 @test4(ptr %p, i32 signext %b) nounwind {
; RV64I-LABEL: test4:
; RV64I: # %bb.0:
; RV64I-NEXT: lw a0, 0(a0)
; RV64I-NEXT: li a2, 1
; RV64I-NEXT: sllw a1, a2, a1
; RV64I-NEXT: xor a0, a1, a0
; RV64I-NEXT: not a0, a0
; RV64I-NEXT: ret
;
; RV64ZBB-LABEL: test4:
; RV64ZBB: # %bb.0:
; RV64ZBB-NEXT: lw a0, 0(a0)
; RV64ZBB-NEXT: li a2, 1
; RV64ZBB-NEXT: sllw a1, a2, a1
; RV64ZBB-NEXT: xnor a0, a1, a0
; RV64ZBB-NEXT: ret
;
; NOREMOVAL-LABEL: test4:
; NOREMOVAL: # %bb.0:
; NOREMOVAL-NEXT: lw a0, 0(a0)
; NOREMOVAL-NEXT: li a2, 1
; NOREMOVAL-NEXT: sllw a1, a2, a1
; NOREMOVAL-NEXT: xnor a0, a1, a0
; NOREMOVAL-NEXT: ret
%a = load i32, ptr %p
%shl = shl i32 1, %b
%neg = xor i32 %shl, -1
%and1 = xor i32 %neg, %a
ret i32 %and1
}
; Make sure we don't put a sext.w before bar when using cpopw.
define void @test5(i32 signext %arg, i32 signext %arg1) nounwind {
; RV64I-LABEL: test5:
; RV64I: # %bb.0: # %bb
; RV64I-NEXT: addi sp, sp, -48
; RV64I-NEXT: sd ra, 40(sp) # 8-byte Folded Spill
; RV64I-NEXT: sd s0, 32(sp) # 8-byte Folded Spill
; RV64I-NEXT: sd s1, 24(sp) # 8-byte Folded Spill
; RV64I-NEXT: sd s2, 16(sp) # 8-byte Folded Spill
; RV64I-NEXT: sd s3, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: sraw a0, a0, a1
; RV64I-NEXT: lui a1, 349525
; RV64I-NEXT: addiw s0, a1, 1365
; RV64I-NEXT: lui a1, 209715
; RV64I-NEXT: addiw s1, a1, 819
; RV64I-NEXT: lui a1, 61681
; RV64I-NEXT: addiw s2, a1, -241
; RV64I-NEXT: lui a1, 4112
; RV64I-NEXT: addiw s3, a1, 257
; RV64I-NEXT: .LBB4_1: # %bb2
; RV64I-NEXT: # =>This Inner Loop Header: Depth=1
; RV64I-NEXT: call bar@plt
; RV64I-NEXT: mv a1, a0
; RV64I-NEXT: srli a0, a0, 1
; RV64I-NEXT: and a0, a0, s0
; RV64I-NEXT: sub a0, a1, a0
; RV64I-NEXT: and a2, a0, s1
; RV64I-NEXT: srli a0, a0, 2
; RV64I-NEXT: and a0, a0, s1
; RV64I-NEXT: add a0, a2, a0
; RV64I-NEXT: srli a2, a0, 4
; RV64I-NEXT: add a0, a0, a2
; RV64I-NEXT: and a0, a0, s2
; RV64I-NEXT: mul a0, a0, s3
; RV64I-NEXT: srliw a0, a0, 24
; RV64I-NEXT: bnez a1, .LBB4_1
; RV64I-NEXT: # %bb.2: # %bb7
; RV64I-NEXT: ld ra, 40(sp) # 8-byte Folded Reload
; RV64I-NEXT: ld s0, 32(sp) # 8-byte Folded Reload
; RV64I-NEXT: ld s1, 24(sp) # 8-byte Folded Reload
; RV64I-NEXT: ld s2, 16(sp) # 8-byte Folded Reload
; RV64I-NEXT: ld s3, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 48
; RV64I-NEXT: ret
;
; RV64ZBB-LABEL: test5:
; RV64ZBB: # %bb.0: # %bb
; RV64ZBB-NEXT: addi sp, sp, -16
; RV64ZBB-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64ZBB-NEXT: sraw a0, a0, a1
; RV64ZBB-NEXT: .LBB4_1: # %bb2
; RV64ZBB-NEXT: # =>This Inner Loop Header: Depth=1
; RV64ZBB-NEXT: call bar@plt
; RV64ZBB-NEXT: mv a1, a0
; RV64ZBB-NEXT: cpopw a0, a0
; RV64ZBB-NEXT: bnez a1, .LBB4_1
; RV64ZBB-NEXT: # %bb.2: # %bb7
; RV64ZBB-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64ZBB-NEXT: addi sp, sp, 16
; RV64ZBB-NEXT: ret
;
; NOREMOVAL-LABEL: test5:
; NOREMOVAL: # %bb.0: # %bb
; NOREMOVAL-NEXT: addi sp, sp, -16
; NOREMOVAL-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: sraw a1, a0, a1
; NOREMOVAL-NEXT: .LBB4_1: # %bb2
; NOREMOVAL-NEXT: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: sext.w a0, a1
; NOREMOVAL-NEXT: call bar@plt
; NOREMOVAL-NEXT: cpopw a1, a0
; NOREMOVAL-NEXT: bnez a0, .LBB4_1
; NOREMOVAL-NEXT: # %bb.2: # %bb7
; NOREMOVAL-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: addi sp, sp, 16
; NOREMOVAL-NEXT: ret
bb:
%i = ashr i32 %arg, %arg1
br label %bb2
bb2: ; preds = %bb2, %bb
%i3 = phi i32 [ %i, %bb ], [ %i5, %bb2 ]
%i4 = tail call signext i32 @bar(i32 signext %i3)
%i5 = tail call i32 @llvm.ctpop.i32(i32 %i4)
%i6 = icmp eq i32 %i4, 0
br i1 %i6, label %bb7, label %bb2
bb7: ; preds = %bb2
ret void
}
declare i32 @llvm.ctpop.i32(i32)
define void @test6(i32 signext %arg, i32 signext %arg1) nounwind {
; CHECK-LABEL: test6:
; CHECK: # %bb.0: # %bb
; CHECK-NEXT: addi sp, sp, -16
; CHECK-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; CHECK-NEXT: fsw fs0, 4(sp) # 4-byte Folded Spill
; CHECK-NEXT: sraw a0, a0, a1
; CHECK-NEXT: fmv.w.x fs0, zero
; CHECK-NEXT: .LBB5_1: # %bb2
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: call baz@plt
; CHECK-NEXT: feq.s a1, fa0, fs0
; CHECK-NEXT: fcvt.w.s a0, fa0, rtz
; CHECK-NEXT: beqz a1, .LBB5_1
; CHECK-NEXT: # %bb.2: # %bb7
; CHECK-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; CHECK-NEXT: flw fs0, 4(sp) # 4-byte Folded Reload
; CHECK-NEXT: addi sp, sp, 16
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test6:
; NOREMOVAL: # %bb.0: # %bb
; NOREMOVAL-NEXT: addi sp, sp, -16
; NOREMOVAL-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: fsw fs0, 4(sp) # 4-byte Folded Spill
; NOREMOVAL-NEXT: sraw a0, a0, a1
; NOREMOVAL-NEXT: fmv.w.x fs0, zero
; NOREMOVAL-NEXT: .LBB5_1: # %bb2
; NOREMOVAL-NEXT: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: sext.w a0, a0
; NOREMOVAL-NEXT: call baz@plt
; NOREMOVAL-NEXT: feq.s a1, fa0, fs0
; NOREMOVAL-NEXT: fcvt.w.s a0, fa0, rtz
; NOREMOVAL-NEXT: beqz a1, .LBB5_1
; NOREMOVAL-NEXT: # %bb.2: # %bb7
; NOREMOVAL-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: flw fs0, 4(sp) # 4-byte Folded Reload
; NOREMOVAL-NEXT: addi sp, sp, 16
; NOREMOVAL-NEXT: ret
bb:
%i = ashr i32 %arg, %arg1
br label %bb2
bb2: ; preds = %bb2, %bb
%i3 = phi i32 [ %i, %bb ], [ %i5, %bb2 ]
%i4 = tail call float @baz(i32 signext %i3)
%i5 = fptosi float %i4 to i32
%i6 = fcmp oeq float %i4, zeroinitializer
br i1 %i6, label %bb7, label %bb2
bb7: ; preds = %bb2
ret void
}
declare float @baz(i32 signext %i3)
define void @test7(i32 signext %arg, i32 signext %arg1) nounwind {
; RV64I-LABEL: test7:
; RV64I: # %bb.0: # %bb
; RV64I-NEXT: addi sp, sp, -48
; RV64I-NEXT: sd ra, 40(sp) # 8-byte Folded Spill
; RV64I-NEXT: sd s0, 32(sp) # 8-byte Folded Spill
; RV64I-NEXT: sd s1, 24(sp) # 8-byte Folded Spill
; RV64I-NEXT: sd s2, 16(sp) # 8-byte Folded Spill
; RV64I-NEXT: sd s3, 8(sp) # 8-byte Folded Spill
; RV64I-NEXT: sraw a0, a0, a1
; RV64I-NEXT: lui a1, 349525
; RV64I-NEXT: addiw s0, a1, 1365
; RV64I-NEXT: slli a1, s0, 32
; RV64I-NEXT: add s0, s0, a1
; RV64I-NEXT: lui a1, 209715
; RV64I-NEXT: addiw s1, a1, 819
; RV64I-NEXT: slli a1, s1, 32
; RV64I-NEXT: add s1, s1, a1
; RV64I-NEXT: lui a1, 61681
; RV64I-NEXT: addiw s2, a1, -241
; RV64I-NEXT: slli a1, s2, 32
; RV64I-NEXT: add s2, s2, a1
; RV64I-NEXT: lui a1, 4112
; RV64I-NEXT: addiw s3, a1, 257
; RV64I-NEXT: slli a1, s3, 32
; RV64I-NEXT: add s3, s3, a1
; RV64I-NEXT: .LBB6_1: # %bb2
; RV64I-NEXT: # =>This Inner Loop Header: Depth=1
; RV64I-NEXT: call foo@plt
; RV64I-NEXT: srli a1, a0, 1
; RV64I-NEXT: and a1, a1, s0
; RV64I-NEXT: sub a0, a0, a1
; RV64I-NEXT: and a1, a0, s1
; RV64I-NEXT: srli a0, a0, 2
; RV64I-NEXT: and a0, a0, s1
; RV64I-NEXT: add a0, a1, a0
; RV64I-NEXT: srli a1, a0, 4
; RV64I-NEXT: add a0, a0, a1
; RV64I-NEXT: and a0, a0, s2
; RV64I-NEXT: mul a0, a0, s3
; RV64I-NEXT: srli a0, a0, 56
; RV64I-NEXT: bnez a0, .LBB6_1
; RV64I-NEXT: # %bb.2: # %bb7
; RV64I-NEXT: ld ra, 40(sp) # 8-byte Folded Reload
; RV64I-NEXT: ld s0, 32(sp) # 8-byte Folded Reload
; RV64I-NEXT: ld s1, 24(sp) # 8-byte Folded Reload
; RV64I-NEXT: ld s2, 16(sp) # 8-byte Folded Reload
; RV64I-NEXT: ld s3, 8(sp) # 8-byte Folded Reload
; RV64I-NEXT: addi sp, sp, 48
; RV64I-NEXT: ret
;
; RV64ZBB-LABEL: test7:
; RV64ZBB: # %bb.0: # %bb
; RV64ZBB-NEXT: addi sp, sp, -16
; RV64ZBB-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; RV64ZBB-NEXT: sraw a0, a0, a1
; RV64ZBB-NEXT: .LBB6_1: # %bb2
; RV64ZBB-NEXT: # =>This Inner Loop Header: Depth=1
; RV64ZBB-NEXT: call foo@plt
; RV64ZBB-NEXT: cpop a0, a0
; RV64ZBB-NEXT: bnez a0, .LBB6_1
; RV64ZBB-NEXT: # %bb.2: # %bb7
; RV64ZBB-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; RV64ZBB-NEXT: addi sp, sp, 16
; RV64ZBB-NEXT: ret
;
; NOREMOVAL-LABEL: test7:
; NOREMOVAL: # %bb.0: # %bb
; NOREMOVAL-NEXT: addi sp, sp, -16
; NOREMOVAL-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: sraw a0, a0, a1
; NOREMOVAL-NEXT: .LBB6_1: # %bb2
; NOREMOVAL-NEXT: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: sext.w a0, a0
; NOREMOVAL-NEXT: call foo@plt
; NOREMOVAL-NEXT: cpop a0, a0
; NOREMOVAL-NEXT: bnez a0, .LBB6_1
; NOREMOVAL-NEXT: # %bb.2: # %bb7
; NOREMOVAL-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: addi sp, sp, 16
; NOREMOVAL-NEXT: ret
bb:
%i = ashr i32 %arg, %arg1
br label %bb2
bb2: ; preds = %bb2, %bb
%i3 = phi i32 [ %i, %bb ], [ %i6, %bb2 ]
%i4 = tail call signext i64 @foo(i32 signext %i3)
%i5 = tail call i64 @llvm.ctpop.i64(i64 %i4)
%i6 = trunc i64 %i5 to i32
%i7 = icmp eq i32 %i6, 0
br i1 %i7, label %bb7, label %bb2
bb7: ; preds = %bb2
ret void
}
declare i64 @llvm.ctpop.i64(i64)
define void @test8(i32 signext %arg, i32 signext %arg1) nounwind {
; CHECK-LABEL: test8:
; CHECK: # %bb.0: # %bb
; CHECK-NEXT: addi sp, sp, -16
; CHECK-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; CHECK-NEXT: sraw a0, a0, a1
; CHECK-NEXT: .LBB7_1: # %bb2
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: call foo@plt
; CHECK-NEXT: ori a0, a0, -256
; CHECK-NEXT: bnez a0, .LBB7_1
; CHECK-NEXT: # %bb.2: # %bb7
; CHECK-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; CHECK-NEXT: addi sp, sp, 16
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test8:
; NOREMOVAL: # %bb.0: # %bb
; NOREMOVAL-NEXT: addi sp, sp, -16
; NOREMOVAL-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: sraw a0, a0, a1
; NOREMOVAL-NEXT: .LBB7_1: # %bb2
; NOREMOVAL-NEXT: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: sext.w a0, a0
; NOREMOVAL-NEXT: call foo@plt
; NOREMOVAL-NEXT: ori a0, a0, -256
; NOREMOVAL-NEXT: bnez a0, .LBB7_1
; NOREMOVAL-NEXT: # %bb.2: # %bb7
; NOREMOVAL-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: addi sp, sp, 16
; NOREMOVAL-NEXT: ret
bb:
%i = ashr i32 %arg, %arg1
br label %bb2
bb2: ; preds = %bb2, %bb
%i3 = phi i32 [ %i, %bb ], [ %i6, %bb2 ]
%i4 = tail call signext i64 @foo(i32 signext %i3)
%i5 = or i64 %i4, -256
%i6 = trunc i64 %i5 to i32
%i7 = icmp eq i32 %i6, 0
br i1 %i7, label %bb7, label %bb2
bb7: ; preds = %bb2
ret void
}
declare i64 @foo(i32 signext)
define void @test9(i32 signext %arg, i32 signext %arg1) nounwind {
; CHECK-LABEL: test9:
; CHECK: # %bb.0: # %bb
; CHECK-NEXT: addi sp, sp, -16
; CHECK-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; CHECK-NEXT: sd s0, 0(sp) # 8-byte Folded Spill
; CHECK-NEXT: sraw a0, a0, a1
; CHECK-NEXT: li s0, 254
; CHECK-NEXT: .LBB8_1: # %bb2
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: call bar@plt
; CHECK-NEXT: mv a1, a0
; CHECK-NEXT: slti a0, a0, 255
; CHECK-NEXT: blt s0, a1, .LBB8_1
; CHECK-NEXT: # %bb.2: # %bb7
; CHECK-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; CHECK-NEXT: ld s0, 0(sp) # 8-byte Folded Reload
; CHECK-NEXT: addi sp, sp, 16
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test9:
; NOREMOVAL: # %bb.0: # %bb
; NOREMOVAL-NEXT: addi sp, sp, -16
; NOREMOVAL-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: sd s0, 0(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: sraw a1, a0, a1
; NOREMOVAL-NEXT: li s0, 254
; NOREMOVAL-NEXT: .LBB8_1: # %bb2
; NOREMOVAL-NEXT: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: sext.w a0, a1
; NOREMOVAL-NEXT: call bar@plt
; NOREMOVAL-NEXT: slti a1, a0, 255
; NOREMOVAL-NEXT: blt s0, a0, .LBB8_1
; NOREMOVAL-NEXT: # %bb.2: # %bb7
; NOREMOVAL-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: ld s0, 0(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: addi sp, sp, 16
; NOREMOVAL-NEXT: ret
bb:
%i = ashr i32 %arg, %arg1
br label %bb2
bb2: ; preds = %bb2, %bb
%i3 = phi i32 [ %i, %bb ], [ %i7, %bb2 ]
%i4 = tail call signext i32 @bar(i32 signext %i3)
%i5 = icmp slt i32 %i4, 255
%i6 = sext i1 %i5 to i32
%i7 = sub i32 0, %i6
br i1 %i5, label %bb7, label %bb2
bb7: ; preds = %bb2
ret void
}
define void @test10(i32 signext %arg, i32 signext %arg1) nounwind {
; CHECK-LABEL: test10:
; CHECK: # %bb.0: # %bb
; CHECK-NEXT: addi sp, sp, -16
; CHECK-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; CHECK-NEXT: fsw fs0, 4(sp) # 4-byte Folded Spill
; CHECK-NEXT: sraw a0, a0, a1
; CHECK-NEXT: fmv.w.x fs0, zero
; CHECK-NEXT: .LBB9_1: # %bb2
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: call baz@plt
; CHECK-NEXT: feq.s a1, fa0, fs0
; CHECK-NEXT: fmv.x.w a0, fa0
; CHECK-NEXT: beqz a1, .LBB9_1
; CHECK-NEXT: # %bb.2: # %bb7
; CHECK-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; CHECK-NEXT: flw fs0, 4(sp) # 4-byte Folded Reload
; CHECK-NEXT: addi sp, sp, 16
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test10:
; NOREMOVAL: # %bb.0: # %bb
; NOREMOVAL-NEXT: addi sp, sp, -16
; NOREMOVAL-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: fsw fs0, 4(sp) # 4-byte Folded Spill
; NOREMOVAL-NEXT: sraw a0, a0, a1
; NOREMOVAL-NEXT: fmv.w.x fs0, zero
; NOREMOVAL-NEXT: .LBB9_1: # %bb2
; NOREMOVAL-NEXT: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: sext.w a0, a0
; NOREMOVAL-NEXT: call baz@plt
; NOREMOVAL-NEXT: feq.s a1, fa0, fs0
; NOREMOVAL-NEXT: fmv.x.w a0, fa0
; NOREMOVAL-NEXT: beqz a1, .LBB9_1
; NOREMOVAL-NEXT: # %bb.2: # %bb7
; NOREMOVAL-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: flw fs0, 4(sp) # 4-byte Folded Reload
; NOREMOVAL-NEXT: addi sp, sp, 16
; NOREMOVAL-NEXT: ret
bb:
%i = ashr i32 %arg, %arg1
br label %bb2
bb2: ; preds = %bb2, %bb
%i3 = phi i32 [ %i, %bb ], [ %i5, %bb2 ]
%i4 = tail call float @baz(i32 signext %i3)
%i5 = bitcast float %i4 to i32
%i6 = fcmp oeq float %i4, zeroinitializer
br i1 %i6, label %bb7, label %bb2
bb7: ; preds = %bb2
ret void
}
; simple test for forward-searching. (and 1234) only uses lower word of input
define signext i32 @test11(i64 %arg1, i64 %arg2, i64 %arg3) {
; CHECK-LABEL: test11:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: addi a2, a2, -1
; CHECK-NEXT: li a3, 256
; CHECK-NEXT: .LBB10_1: # %bb2
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: andi a0, a0, 1234
; CHECK-NEXT: addi a2, a2, 1
; CHECK-NEXT: addw a0, a0, a1
; CHECK-NEXT: bltu a2, a3, .LBB10_1
; CHECK-NEXT: # %bb.2: # %bb7
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test11:
; NOREMOVAL: # %bb.0: # %entry
; NOREMOVAL-NEXT: addi a2, a2, -1
; NOREMOVAL-NEXT: li a3, 256
; NOREMOVAL-NEXT: .LBB10_1: # %bb2
; NOREMOVAL-NEXT: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: andi a0, a0, 1234
; NOREMOVAL-NEXT: addi a2, a2, 1
; NOREMOVAL-NEXT: add a0, a0, a1
; NOREMOVAL-NEXT: bltu a2, a3, .LBB10_1
; NOREMOVAL-NEXT: # %bb.2: # %bb7
; NOREMOVAL-NEXT: sext.w a0, a0
; NOREMOVAL-NEXT: ret
entry:
br label %bb2
bb2: ; preds = %bb2, %entry
%i1 = phi i64 [ %arg1, %entry ], [ %i5, %bb2 ]
%i2 = phi i64 [ %arg3, %entry ], [ %i3, %bb2 ]
%i3 = add i64 %i2, 1
%i4 = and i64 %i1, 1234
%i5 = add i64 %i4, %arg2
%i6 = icmp ugt i64 %i2, 255
br i1 %i6, label %bb7, label %bb2
bb7: ; preds = %bb2
%i7 = trunc i64 %i5 to i32
ret i32 %i7
}
; circular use-dependency and multiple transformations.
define signext i32 @test12(i64 %arg1, i64 %arg2, i64 %arg3) {
; CHECK-LABEL: test12:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: addi a3, a2, -1
; CHECK-NEXT: li a4, 256
; CHECK-NEXT: .LBB11_1: # %bb2
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: xor a0, a0, a1
; CHECK-NEXT: mulw a2, a0, a1
; CHECK-NEXT: addw a0, a0, a2
; CHECK-NEXT: and a2, a2, a0
; CHECK-NEXT: addi a3, a3, 1
; CHECK-NEXT: add a0, a2, a1
; CHECK-NEXT: bltu a3, a4, .LBB11_1
; CHECK-NEXT: # %bb.2: # %bb7
; CHECK-NEXT: mv a0, a2
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test12:
; NOREMOVAL: # %bb.0: # %entry
; NOREMOVAL-NEXT: addi a2, a2, -1
; NOREMOVAL-NEXT: li a3, 256
; NOREMOVAL-NEXT: .LBB11_1: # %bb2
; NOREMOVAL-NEXT: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: xor a0, a0, a1
; NOREMOVAL-NEXT: mul a4, a0, a1
; NOREMOVAL-NEXT: add a0, a0, a4
; NOREMOVAL-NEXT: and a4, a4, a0
; NOREMOVAL-NEXT: addi a2, a2, 1
; NOREMOVAL-NEXT: add a0, a4, a1
; NOREMOVAL-NEXT: bltu a2, a3, .LBB11_1
; NOREMOVAL-NEXT: # %bb.2: # %bb7
; NOREMOVAL-NEXT: sext.w a0, a4
; NOREMOVAL-NEXT: ret
entry:
br label %bb2
bb2: ; preds = %bb2, %entry
%i1 = phi i64 [ %arg1, %entry ], [ %i6, %bb2 ]
%i2 = phi i64 [ %arg3, %entry ], [ %i3, %bb2 ]
%i3 = add i64 %i2, 1
%i4 = xor i64 %i1, %arg2
%i5 = mul i64 %i4, %arg2
%i9 = add i64 %i4, %i5
%i8 = and i64 %i5, %i9
%i6 = add i64 %i8, %arg2
%i7 = icmp ugt i64 %i2, 255
br i1 %i7, label %bb7, label %bb2
bb7: ; preds = %bb2
%r = trunc i64 %i8 to i32
ret i32 %r
}
; Not optimized. sdiv doesn't only use lower word
define signext i32 @test13(i64 %arg1, i64 %arg2, i64 %arg3) {
; CHECK-LABEL: test13:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: addi a2, a2, -1
; CHECK-NEXT: li a3, 256
; CHECK-NEXT: .LBB12_1: # %bb2
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: div a0, a0, a1
; CHECK-NEXT: addi a2, a2, 1
; CHECK-NEXT: add a0, a0, a1
; CHECK-NEXT: bltu a2, a3, .LBB12_1
; CHECK-NEXT: # %bb.2: # %bb7
; CHECK-NEXT: sext.w a0, a0
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test13:
; NOREMOVAL: # %bb.0: # %entry
; NOREMOVAL-NEXT: addi a2, a2, -1
; NOREMOVAL-NEXT: li a3, 256
; NOREMOVAL-NEXT: .LBB12_1: # %bb2
; NOREMOVAL-NEXT: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: div a0, a0, a1
; NOREMOVAL-NEXT: addi a2, a2, 1
; NOREMOVAL-NEXT: add a0, a0, a1
; NOREMOVAL-NEXT: bltu a2, a3, .LBB12_1
; NOREMOVAL-NEXT: # %bb.2: # %bb7
; NOREMOVAL-NEXT: sext.w a0, a0
; NOREMOVAL-NEXT: ret
entry:
br label %bb2
bb2: ; preds = %bb2, %entry
%i1 = phi i64 [ %arg1, %entry ], [ %i5, %bb2 ]
%i2 = phi i64 [ %arg3, %entry ], [ %i3, %bb2 ]
%i3 = add i64 %i2, 1
%i4 = sdiv i64 %i1, %arg2
%i5 = add i64 %i4, %arg2
%i6 = icmp ugt i64 %i2, 255
br i1 %i6, label %bb7, label %bb2
bb7: ; preds = %bb2
%i8 = trunc i64 %i5 to i32
ret i32 %i8
}
; int test14(int a, int n) {
; for (int i = 1; i < n; ++i) {
; if (a > 1000)
; return -1;
; a += i;
; }
;
; return a;
; }
;
; There should be no sext.w in the loop.
define signext i32 @test14(i32 signext %0, i32 signext %1) {
; CHECK-LABEL: test14:
; CHECK: # %bb.0:
; CHECK-NEXT: li a2, 2
; CHECK-NEXT: blt a1, a2, .LBB13_4
; CHECK-NEXT: # %bb.1: # %.preheader
; CHECK-NEXT: li a2, 1
; CHECK-NEXT: li a3, 1000
; CHECK-NEXT: .LBB13_2: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: blt a3, a0, .LBB13_5
; CHECK-NEXT: # %bb.3: # in Loop: Header=BB13_2 Depth=1
; CHECK-NEXT: addw a0, a2, a0
; CHECK-NEXT: addiw a2, a2, 1
; CHECK-NEXT: blt a2, a1, .LBB13_2
; CHECK-NEXT: .LBB13_4:
; CHECK-NEXT: ret
; CHECK-NEXT: .LBB13_5:
; CHECK-NEXT: li a0, -1
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test14:
; NOREMOVAL: # %bb.0:
; NOREMOVAL-NEXT: li a2, 2
; NOREMOVAL-NEXT: blt a1, a2, .LBB13_4
; NOREMOVAL-NEXT: # %bb.1: # %.preheader
; NOREMOVAL-NEXT: li a2, 1
; NOREMOVAL-NEXT: li a3, 1000
; NOREMOVAL-NEXT: .LBB13_2: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: sext.w a4, a0
; NOREMOVAL-NEXT: blt a3, a4, .LBB13_5
; NOREMOVAL-NEXT: # %bb.3: # in Loop: Header=BB13_2 Depth=1
; NOREMOVAL-NEXT: addw a0, a2, a0
; NOREMOVAL-NEXT: addiw a2, a2, 1
; NOREMOVAL-NEXT: blt a2, a1, .LBB13_2
; NOREMOVAL-NEXT: .LBB13_4:
; NOREMOVAL-NEXT: ret
; NOREMOVAL-NEXT: .LBB13_5:
; NOREMOVAL-NEXT: li a0, -1
; NOREMOVAL-NEXT: ret
%3 = icmp sgt i32 %1, 1
br i1 %3, label %4, label %12
4: ; preds = %2, %8
%5 = phi i32 [ %10, %8 ], [ 1, %2 ]
%6 = phi i32 [ %9, %8 ], [ %0, %2 ]
%7 = icmp sgt i32 %6, 1000
br i1 %7, label %12, label %8
8: ; preds = %4
%9 = add nsw i32 %5, %6
%10 = add nuw nsw i32 %5, 1
%11 = icmp slt i32 %10, %1
br i1 %11, label %4, label %12
12: ; preds = %8, %4, %2
%13 = phi i32 [ %0, %2 ], [ -1, %4 ], [ %9, %8 ]
ret i32 %13
}
; Same as test14 but the signext attribute is missing from the argument so we
; can't optimize out the sext.w.
define signext i32 @test14b(i32 %0, i32 signext %1) {
; CHECK-LABEL: test14b:
; CHECK: # %bb.0:
; CHECK-NEXT: li a2, 2
; CHECK-NEXT: blt a1, a2, .LBB14_4
; CHECK-NEXT: # %bb.1: # %.preheader
; CHECK-NEXT: li a2, 1
; CHECK-NEXT: li a3, 1000
; CHECK-NEXT: .LBB14_2: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: sext.w a4, a0
; CHECK-NEXT: blt a3, a4, .LBB14_5
; CHECK-NEXT: # %bb.3: # in Loop: Header=BB14_2 Depth=1
; CHECK-NEXT: add a0, a2, a0
; CHECK-NEXT: addiw a2, a2, 1
; CHECK-NEXT: blt a2, a1, .LBB14_2
; CHECK-NEXT: .LBB14_4:
; CHECK-NEXT: sext.w a0, a0
; CHECK-NEXT: ret
; CHECK-NEXT: .LBB14_5:
; CHECK-NEXT: li a0, -1
; CHECK-NEXT: sext.w a0, a0
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test14b:
; NOREMOVAL: # %bb.0:
; NOREMOVAL-NEXT: li a2, 2
; NOREMOVAL-NEXT: blt a1, a2, .LBB14_4
; NOREMOVAL-NEXT: # %bb.1: # %.preheader
; NOREMOVAL-NEXT: li a2, 1
; NOREMOVAL-NEXT: li a3, 1000
; NOREMOVAL-NEXT: .LBB14_2: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: sext.w a4, a0
; NOREMOVAL-NEXT: blt a3, a4, .LBB14_5
; NOREMOVAL-NEXT: # %bb.3: # in Loop: Header=BB14_2 Depth=1
; NOREMOVAL-NEXT: add a0, a2, a0
; NOREMOVAL-NEXT: addiw a2, a2, 1
; NOREMOVAL-NEXT: blt a2, a1, .LBB14_2
; NOREMOVAL-NEXT: .LBB14_4:
; NOREMOVAL-NEXT: sext.w a0, a0
; NOREMOVAL-NEXT: ret
; NOREMOVAL-NEXT: .LBB14_5:
; NOREMOVAL-NEXT: li a0, -1
; NOREMOVAL-NEXT: sext.w a0, a0
; NOREMOVAL-NEXT: ret
%3 = icmp sgt i32 %1, 1
br i1 %3, label %4, label %12
4: ; preds = %2, %8
%5 = phi i32 [ %10, %8 ], [ 1, %2 ]
%6 = phi i32 [ %9, %8 ], [ %0, %2 ]
%7 = icmp sgt i32 %6, 1000
br i1 %7, label %12, label %8
8: ; preds = %4
%9 = add nsw i32 %5, %6
%10 = add nuw nsw i32 %5, 1
%11 = icmp slt i32 %10, %1
br i1 %11, label %4, label %12
12: ; preds = %8, %4, %2
%13 = phi i32 [ %0, %2 ], [ -1, %4 ], [ %9, %8 ]
ret i32 %13
}
; Same as test14, but the argument is zero extended instead of sign extended so
; we can't optimize it.
define signext i32 @test14c(i32 zeroext %0, i32 signext %1) {
; CHECK-LABEL: test14c:
; CHECK: # %bb.0:
; CHECK-NEXT: li a2, 2
; CHECK-NEXT: blt a1, a2, .LBB15_4
; CHECK-NEXT: # %bb.1: # %.preheader
; CHECK-NEXT: li a2, 1
; CHECK-NEXT: li a3, 1000
; CHECK-NEXT: .LBB15_2: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: sext.w a4, a0
; CHECK-NEXT: blt a3, a4, .LBB15_5
; CHECK-NEXT: # %bb.3: # in Loop: Header=BB15_2 Depth=1
; CHECK-NEXT: add a0, a2, a0
; CHECK-NEXT: addiw a2, a2, 1
; CHECK-NEXT: blt a2, a1, .LBB15_2
; CHECK-NEXT: .LBB15_4:
; CHECK-NEXT: sext.w a0, a0
; CHECK-NEXT: ret
; CHECK-NEXT: .LBB15_5:
; CHECK-NEXT: li a0, -1
; CHECK-NEXT: sext.w a0, a0
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test14c:
; NOREMOVAL: # %bb.0:
; NOREMOVAL-NEXT: li a2, 2
; NOREMOVAL-NEXT: blt a1, a2, .LBB15_4
; NOREMOVAL-NEXT: # %bb.1: # %.preheader
; NOREMOVAL-NEXT: li a2, 1
; NOREMOVAL-NEXT: li a3, 1000
; NOREMOVAL-NEXT: .LBB15_2: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: sext.w a4, a0
; NOREMOVAL-NEXT: blt a3, a4, .LBB15_5
; NOREMOVAL-NEXT: # %bb.3: # in Loop: Header=BB15_2 Depth=1
; NOREMOVAL-NEXT: add a0, a2, a0
; NOREMOVAL-NEXT: addiw a2, a2, 1
; NOREMOVAL-NEXT: blt a2, a1, .LBB15_2
; NOREMOVAL-NEXT: .LBB15_4:
; NOREMOVAL-NEXT: sext.w a0, a0
; NOREMOVAL-NEXT: ret
; NOREMOVAL-NEXT: .LBB15_5:
; NOREMOVAL-NEXT: li a0, -1
; NOREMOVAL-NEXT: sext.w a0, a0
; NOREMOVAL-NEXT: ret
%3 = icmp sgt i32 %1, 1
br i1 %3, label %4, label %12
4: ; preds = %2, %8
%5 = phi i32 [ %10, %8 ], [ 1, %2 ]
%6 = phi i32 [ %9, %8 ], [ %0, %2 ]
%7 = icmp sgt i32 %6, 1000
br i1 %7, label %12, label %8
8: ; preds = %4
%9 = add nsw i32 %5, %6
%10 = add nuw nsw i32 %5, 1
%11 = icmp slt i32 %10, %1
br i1 %11, label %4, label %12
12: ; preds = %8, %4, %2
%13 = phi i32 [ %0, %2 ], [ -1, %4 ], [ %9, %8 ]
ret i32 %13
}
; Same as test14 but the argument is zero extended from i31. Since bits 63:31
; are zero, this counts as an i32 sign extend so we can optimize it.
define signext i32 @test14d(i31 zeroext %0, i32 signext %1) {
; CHECK-LABEL: test14d:
; CHECK: # %bb.0:
; CHECK-NEXT: li a2, 2
; CHECK-NEXT: blt a1, a2, .LBB16_4
; CHECK-NEXT: # %bb.1: # %.preheader
; CHECK-NEXT: li a2, 1
; CHECK-NEXT: li a3, 1000
; CHECK-NEXT: .LBB16_2: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: blt a3, a0, .LBB16_5
; CHECK-NEXT: # %bb.3: # in Loop: Header=BB16_2 Depth=1
; CHECK-NEXT: addw a0, a2, a0
; CHECK-NEXT: addiw a2, a2, 1
; CHECK-NEXT: blt a2, a1, .LBB16_2
; CHECK-NEXT: .LBB16_4:
; CHECK-NEXT: ret
; CHECK-NEXT: .LBB16_5:
; CHECK-NEXT: li a0, -1
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test14d:
; NOREMOVAL: # %bb.0:
; NOREMOVAL-NEXT: li a2, 2
; NOREMOVAL-NEXT: blt a1, a2, .LBB16_4
; NOREMOVAL-NEXT: # %bb.1: # %.preheader
; NOREMOVAL-NEXT: li a2, 1
; NOREMOVAL-NEXT: li a3, 1000
; NOREMOVAL-NEXT: .LBB16_2: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: sext.w a4, a0
; NOREMOVAL-NEXT: blt a3, a4, .LBB16_5
; NOREMOVAL-NEXT: # %bb.3: # in Loop: Header=BB16_2 Depth=1
; NOREMOVAL-NEXT: addw a0, a2, a0
; NOREMOVAL-NEXT: addiw a2, a2, 1
; NOREMOVAL-NEXT: blt a2, a1, .LBB16_2
; NOREMOVAL-NEXT: .LBB16_4:
; NOREMOVAL-NEXT: ret
; NOREMOVAL-NEXT: .LBB16_5:
; NOREMOVAL-NEXT: li a0, -1
; NOREMOVAL-NEXT: ret
%zext = zext i31 %0 to i32
%3 = icmp sgt i32 %1, 1
br i1 %3, label %4, label %12
4: ; preds = %2, %8
%5 = phi i32 [ %10, %8 ], [ 1, %2 ]
%6 = phi i32 [ %9, %8 ], [ %zext, %2 ]
%7 = icmp sgt i32 %6, 1000
br i1 %7, label %12, label %8
8: ; preds = %4
%9 = add nsw i32 %5, %6
%10 = add nuw nsw i32 %5, 1
%11 = icmp slt i32 %10, %1
br i1 %11, label %4, label %12
12: ; preds = %8, %4, %2
%13 = phi i32 [ %zext, %2 ], [ -1, %4 ], [ %9, %8 ]
ret i32 %13
}
define signext i32 @test15(i64 %arg1, i64 %arg2, i64 %arg3, ptr %arg4) {
; CHECK-LABEL: test15:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: addi a2, a2, -1
; CHECK-NEXT: li a4, 256
; CHECK-NEXT: .LBB17_1: # %bb2
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: andi a0, a0, 1234
; CHECK-NEXT: addw a0, a0, a1
; CHECK-NEXT: addi a2, a2, 1
; CHECK-NEXT: sw a0, 0(a3)
; CHECK-NEXT: bltu a2, a4, .LBB17_1
; CHECK-NEXT: # %bb.2: # %bb7
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test15:
; NOREMOVAL: # %bb.0: # %entry
; NOREMOVAL-NEXT: addi a2, a2, -1
; NOREMOVAL-NEXT: li a4, 256
; NOREMOVAL-NEXT: .LBB17_1: # %bb2
; NOREMOVAL-NEXT: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: andi a0, a0, 1234
; NOREMOVAL-NEXT: add a0, a0, a1
; NOREMOVAL-NEXT: addi a2, a2, 1
; NOREMOVAL-NEXT: sw a0, 0(a3)
; NOREMOVAL-NEXT: bltu a2, a4, .LBB17_1
; NOREMOVAL-NEXT: # %bb.2: # %bb7
; NOREMOVAL-NEXT: sext.w a0, a0
; NOREMOVAL-NEXT: ret
entry:
br label %bb2
bb2: ; preds = %bb2, %entry
%i1 = phi i64 [ %arg1, %entry ], [ %i5, %bb2 ]
%i2 = phi i64 [ %arg3, %entry ], [ %i3, %bb2 ]
%i3 = add i64 %i2, 1
%i4 = and i64 %i1, 1234
%i5 = add i64 %i4, %arg2
%i8 = trunc i64 %i5 to i32
store i32 %i8, ptr %arg4
%i6 = icmp ugt i64 %i2, 255
br i1 %i6, label %bb7, label %bb2
bb7: ; preds = %bb2
%i7 = trunc i64 %i5 to i32
ret i32 %i7
}
; This test previously removed a sext.w without converting a slli to slliw.
define signext i32 @bug(i32 signext %x) {
; CHECK-LABEL: bug:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: beqz a0, .LBB18_4
; CHECK-NEXT: # %bb.1: # %if.end
; CHECK-NEXT: srliw a2, a0, 16
; CHECK-NEXT: seqz a1, a2
; CHECK-NEXT: slli a1, a1, 4
; CHECK-NEXT: sllw a1, a0, a1
; CHECK-NEXT: li a0, 16
; CHECK-NEXT: beqz a2, .LBB18_3
; CHECK-NEXT: # %bb.2: # %if.end
; CHECK-NEXT: li a0, 32
; CHECK-NEXT: .LBB18_3: # %if.end
; CHECK-NEXT: srliw a2, a1, 24
; CHECK-NEXT: seqz a2, a2
; CHECK-NEXT: slli a3, a2, 3
; CHECK-NEXT: sllw a1, a1, a3
; CHECK-NEXT: neg a2, a2
; CHECK-NEXT: andi a2, a2, -8
; CHECK-NEXT: add a0, a0, a2
; CHECK-NEXT: srliw a2, a1, 28
; CHECK-NEXT: seqz a2, a2
; CHECK-NEXT: slli a3, a2, 2
; CHECK-NEXT: sllw a1, a1, a3
; CHECK-NEXT: neg a2, a2
; CHECK-NEXT: andi a2, a2, -4
; CHECK-NEXT: add a0, a0, a2
; CHECK-NEXT: srliw a2, a1, 30
; CHECK-NEXT: seqz a2, a2
; CHECK-NEXT: slli a3, a2, 1
; CHECK-NEXT: sllw a1, a1, a3
; CHECK-NEXT: neg a2, a2
; CHECK-NEXT: andi a2, a2, -2
; CHECK-NEXT: add a0, a0, a2
; CHECK-NEXT: srai a1, a1, 31
; CHECK-NEXT: not a1, a1
; CHECK-NEXT: addw a0, a0, a1
; CHECK-NEXT: .LBB18_4: # %cleanup
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: bug:
; NOREMOVAL: # %bb.0: # %entry
; NOREMOVAL-NEXT: beqz a0, .LBB18_4
; NOREMOVAL-NEXT: # %bb.1: # %if.end
; NOREMOVAL-NEXT: srliw a2, a0, 16
; NOREMOVAL-NEXT: seqz a1, a2
; NOREMOVAL-NEXT: slli a1, a1, 4
; NOREMOVAL-NEXT: sllw a1, a0, a1
; NOREMOVAL-NEXT: li a0, 16
; NOREMOVAL-NEXT: beqz a2, .LBB18_3
; NOREMOVAL-NEXT: # %bb.2: # %if.end
; NOREMOVAL-NEXT: li a0, 32
; NOREMOVAL-NEXT: .LBB18_3: # %if.end
; NOREMOVAL-NEXT: srliw a2, a1, 24
; NOREMOVAL-NEXT: seqz a2, a2
; NOREMOVAL-NEXT: slli a3, a2, 3
; NOREMOVAL-NEXT: sllw a1, a1, a3
; NOREMOVAL-NEXT: neg a2, a2
; NOREMOVAL-NEXT: andi a2, a2, -8
; NOREMOVAL-NEXT: add a0, a0, a2
; NOREMOVAL-NEXT: srliw a2, a1, 28
; NOREMOVAL-NEXT: seqz a2, a2
; NOREMOVAL-NEXT: slli a3, a2, 2
; NOREMOVAL-NEXT: sllw a1, a1, a3
; NOREMOVAL-NEXT: neg a2, a2
; NOREMOVAL-NEXT: andi a2, a2, -4
; NOREMOVAL-NEXT: add a0, a0, a2
; NOREMOVAL-NEXT: srliw a2, a1, 30
; NOREMOVAL-NEXT: seqz a2, a2
; NOREMOVAL-NEXT: slli a3, a2, 1
; NOREMOVAL-NEXT: sllw a1, a1, a3
; NOREMOVAL-NEXT: neg a2, a2
; NOREMOVAL-NEXT: andi a2, a2, -2
; NOREMOVAL-NEXT: add a0, a0, a2
; NOREMOVAL-NEXT: srai a1, a1, 31
; NOREMOVAL-NEXT: not a1, a1
; NOREMOVAL-NEXT: add a0, a0, a1
; NOREMOVAL-NEXT: .LBB18_4: # %cleanup
; NOREMOVAL-NEXT: sext.w a0, a0
; NOREMOVAL-NEXT: ret
entry:
%tobool.not = icmp eq i32 %x, 0
br i1 %tobool.not, label %cleanup, label %if.end
if.end: ; preds = %entry
%tobool1.not = icmp ult i32 %x, 65536
%shl = shl i32 %x, 16
%spec.select = select i1 %tobool1.not, i32 %shl, i32 %x
%spec.select43 = select i1 %tobool1.not, i32 16, i32 32
%tobool5.not = icmp ult i32 %spec.select, 16777216
%shl7 = shl i32 %spec.select, 8
%sub8 = add nsw i32 %spec.select43, -8
%x.addr.1 = select i1 %tobool5.not, i32 %shl7, i32 %spec.select
%r.1 = select i1 %tobool5.not, i32 %sub8, i32 %spec.select43
%tobool11.not = icmp ult i32 %x.addr.1, 268435456
%shl13 = shl i32 %x.addr.1, 4
%sub14 = add nsw i32 %r.1, -4
%x.addr.2 = select i1 %tobool11.not, i32 %shl13, i32 %x.addr.1
%r.2 = select i1 %tobool11.not, i32 %sub14, i32 %r.1
%tobool17.not = icmp ult i32 %x.addr.2, 1073741824
%shl19 = shl i32 %x.addr.2, 2
%sub20 = add nsw i32 %r.2, -2
%x.addr.3 = select i1 %tobool17.not, i32 %shl19, i32 %x.addr.2
%r.3 = select i1 %tobool17.not, i32 %sub20, i32 %r.2
%x.addr.3.lobit = ashr i32 %x.addr.3, 31
%x.addr.3.lobit.not = xor i32 %x.addr.3.lobit, -1
%r.4 = add nsw i32 %r.3, %x.addr.3.lobit.not
br label %cleanup
cleanup: ; preds = %entry, %if.end
%retval.0 = phi i32 [ %r.4, %if.end ], [ 0, %entry ]
ret i32 %retval.0
}
define void @test16(i32 signext %arg, i32 signext %arg1) nounwind {
; CHECK-LABEL: test16:
; CHECK: # %bb.0: # %bb
; CHECK-NEXT: addi sp, sp, -32
; CHECK-NEXT: sd ra, 24(sp) # 8-byte Folded Spill
; CHECK-NEXT: sd s0, 16(sp) # 8-byte Folded Spill
; CHECK-NEXT: sd s1, 8(sp) # 8-byte Folded Spill
; CHECK-NEXT: mv s0, a1
; CHECK-NEXT: call bar@plt
; CHECK-NEXT: mv s1, a0
; CHECK-NEXT: .LBB19_1: # %bb2
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: mv a0, s1
; CHECK-NEXT: call bar@plt
; CHECK-NEXT: sllw s1, s1, s0
; CHECK-NEXT: bnez a0, .LBB19_1
; CHECK-NEXT: # %bb.2: # %bb7
; CHECK-NEXT: ld ra, 24(sp) # 8-byte Folded Reload
; CHECK-NEXT: ld s0, 16(sp) # 8-byte Folded Reload
; CHECK-NEXT: ld s1, 8(sp) # 8-byte Folded Reload
; CHECK-NEXT: addi sp, sp, 32
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test16:
; NOREMOVAL: # %bb.0: # %bb
; NOREMOVAL-NEXT: addi sp, sp, -32
; NOREMOVAL-NEXT: sd ra, 24(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: sd s0, 16(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: sd s1, 8(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: mv s0, a1
; NOREMOVAL-NEXT: call bar@plt
; NOREMOVAL-NEXT: mv s1, a0
; NOREMOVAL-NEXT: .LBB19_1: # %bb2
; NOREMOVAL-NEXT: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: sext.w a0, s1
; NOREMOVAL-NEXT: call bar@plt
; NOREMOVAL-NEXT: sllw s1, s1, s0
; NOREMOVAL-NEXT: bnez a0, .LBB19_1
; NOREMOVAL-NEXT: # %bb.2: # %bb7
; NOREMOVAL-NEXT: ld ra, 24(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: ld s0, 16(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: ld s1, 8(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: addi sp, sp, 32
; NOREMOVAL-NEXT: ret
bb:
%i = call signext i32 @bar(i32 signext %arg)
br label %bb2
bb2: ; preds = %bb2, %bb
%i3 = phi i32 [ %i, %bb ], [ %i5, %bb2 ]
%i4 = tail call signext i32 @bar(i32 signext %i3)
%i5 = shl i32 %i3, %arg1
%i6 = icmp eq i32 %i4, 0
br i1 %i6, label %bb7, label %bb2
bb7: ; preds = %bb2
ret void
}
define void @test17(i32 signext %arg, i32 signext %arg1) nounwind {
; CHECK-LABEL: test17:
; CHECK: # %bb.0: # %bb
; CHECK-NEXT: addi sp, sp, -32
; CHECK-NEXT: sd ra, 24(sp) # 8-byte Folded Spill
; CHECK-NEXT: sd s0, 16(sp) # 8-byte Folded Spill
; CHECK-NEXT: sd s1, 8(sp) # 8-byte Folded Spill
; CHECK-NEXT: mv s0, a1
; CHECK-NEXT: call bat@plt
; CHECK-NEXT: mv s1, a0
; CHECK-NEXT: .LBB20_1: # %bb2
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: mv a0, s1
; CHECK-NEXT: call bar@plt
; CHECK-NEXT: sllw s1, s1, s0
; CHECK-NEXT: bnez a0, .LBB20_1
; CHECK-NEXT: # %bb.2: # %bb7
; CHECK-NEXT: ld ra, 24(sp) # 8-byte Folded Reload
; CHECK-NEXT: ld s0, 16(sp) # 8-byte Folded Reload
; CHECK-NEXT: ld s1, 8(sp) # 8-byte Folded Reload
; CHECK-NEXT: addi sp, sp, 32
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test17:
; NOREMOVAL: # %bb.0: # %bb
; NOREMOVAL-NEXT: addi sp, sp, -32
; NOREMOVAL-NEXT: sd ra, 24(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: sd s0, 16(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: sd s1, 8(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: mv s0, a1
; NOREMOVAL-NEXT: call bat@plt
; NOREMOVAL-NEXT: mv s1, a0
; NOREMOVAL-NEXT: .LBB20_1: # %bb2
; NOREMOVAL-NEXT: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: sext.w a0, s1
; NOREMOVAL-NEXT: call bar@plt
; NOREMOVAL-NEXT: sllw s1, s1, s0
; NOREMOVAL-NEXT: bnez a0, .LBB20_1
; NOREMOVAL-NEXT: # %bb.2: # %bb7
; NOREMOVAL-NEXT: ld ra, 24(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: ld s0, 16(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: ld s1, 8(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: addi sp, sp, 32
; NOREMOVAL-NEXT: ret
bb:
%i = call zeroext i16 @bat(i32 signext %arg)
%zext = zext i16 %i to i32
br label %bb2
bb2: ; preds = %bb2, %bb
%i3 = phi i32 [ %zext, %bb ], [ %i5, %bb2 ]
%i4 = tail call signext i32 @bar(i32 signext %i3)
%i5 = shl i32 %i3, %arg1
%i6 = icmp eq i32 %i4, 0
br i1 %i6, label %bb7, label %bb2
bb7: ; preds = %bb2
ret void
}
declare zeroext i16 @bat(i32 signext)
define void @test18(i32 signext %arg, i32 signext %arg1) nounwind {
; CHECK-LABEL: test18:
; CHECK: # %bb.0: # %bb
; CHECK-NEXT: addi sp, sp, -32
; CHECK-NEXT: sd ra, 24(sp) # 8-byte Folded Spill
; CHECK-NEXT: sd s0, 16(sp) # 8-byte Folded Spill
; CHECK-NEXT: sd s1, 8(sp) # 8-byte Folded Spill
; CHECK-NEXT: mv s0, a1
; CHECK-NEXT: sha256sig0 s1, a1
; CHECK-NEXT: .LBB21_1: # %bb2
; CHECK-NEXT: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: mv a0, s1
; CHECK-NEXT: call bar@plt
; CHECK-NEXT: sllw s1, s1, s0
; CHECK-NEXT: bnez a0, .LBB21_1
; CHECK-NEXT: # %bb.2: # %bb7
; CHECK-NEXT: ld ra, 24(sp) # 8-byte Folded Reload
; CHECK-NEXT: ld s0, 16(sp) # 8-byte Folded Reload
; CHECK-NEXT: ld s1, 8(sp) # 8-byte Folded Reload
; CHECK-NEXT: addi sp, sp, 32
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test18:
; NOREMOVAL: # %bb.0: # %bb
; NOREMOVAL-NEXT: addi sp, sp, -32
; NOREMOVAL-NEXT: sd ra, 24(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: sd s0, 16(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: sd s1, 8(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: mv s0, a1
; NOREMOVAL-NEXT: sha256sig0 s1, a1
; NOREMOVAL-NEXT: .LBB21_1: # %bb2
; NOREMOVAL-NEXT: # =>This Inner Loop Header: Depth=1
; NOREMOVAL-NEXT: sext.w a0, s1
; NOREMOVAL-NEXT: call bar@plt
; NOREMOVAL-NEXT: sllw s1, s1, s0
; NOREMOVAL-NEXT: bnez a0, .LBB21_1
; NOREMOVAL-NEXT: # %bb.2: # %bb7
; NOREMOVAL-NEXT: ld ra, 24(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: ld s0, 16(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: ld s1, 8(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: addi sp, sp, 32
; NOREMOVAL-NEXT: ret
bb:
%i = call i32 @llvm.riscv.sha256sig0(i32 %arg1)
br label %bb2
bb2: ; preds = %bb2, %bb
%i3 = phi i32 [ %i, %bb ], [ %i5, %bb2 ]
%i4 = tail call signext i32 @bar(i32 signext %i3)
%i5 = shl i32 %i3, %arg1
%i6 = icmp eq i32 %i4, 0
br i1 %i6, label %bb7, label %bb2
bb7: ; preds = %bb2
ret void
}
declare i32 @llvm.riscv.sha256sig0(i32)
; The type promotion of %7 forms a sext_inreg, but %7 and %6 are combined to
; form a sh2add. This leaves behind a sext.w that isn't needed.
define signext i32 @sextw_sh2add(i1 zeroext %0, ptr %1, i32 signext %2, i32 signext %3, i32 signext %4) {
; RV64I-LABEL: sextw_sh2add:
; RV64I: # %bb.0:
; RV64I-NEXT: slli a2, a2, 2
; RV64I-NEXT: add a3, a2, a3
; RV64I-NEXT: beqz a0, .LBB22_2
; RV64I-NEXT: # %bb.1:
; RV64I-NEXT: sw a3, 0(a1)
; RV64I-NEXT: .LBB22_2:
; RV64I-NEXT: addw a0, a3, a4
; RV64I-NEXT: ret
;
; RV64ZBB-LABEL: sextw_sh2add:
; RV64ZBB: # %bb.0:
; RV64ZBB-NEXT: sh2add a2, a2, a3
; RV64ZBB-NEXT: beqz a0, .LBB22_2
; RV64ZBB-NEXT: # %bb.1:
; RV64ZBB-NEXT: sw a2, 0(a1)
; RV64ZBB-NEXT: .LBB22_2:
; RV64ZBB-NEXT: addw a0, a2, a4
; RV64ZBB-NEXT: ret
;
; NOREMOVAL-LABEL: sextw_sh2add:
; NOREMOVAL: # %bb.0:
; NOREMOVAL-NEXT: sh2add a2, a2, a3
; NOREMOVAL-NEXT: sext.w a2, a2
; NOREMOVAL-NEXT: beqz a0, .LBB22_2
; NOREMOVAL-NEXT: # %bb.1:
; NOREMOVAL-NEXT: sw a2, 0(a1)
; NOREMOVAL-NEXT: .LBB22_2:
; NOREMOVAL-NEXT: addw a0, a2, a4
; NOREMOVAL-NEXT: ret
%6 = shl i32 %2, 2
%7 = add i32 %6, %3
br i1 %0, label %8, label %9
8: ; preds = %5
store i32 %7, ptr %1, align 4
br label %9
9: ; preds = %5, %8
%10 = add i32 %7, %4
ret i32 %10
}
; Negative test - an explicit sext.w *is* required
define signext i32 @test19(i64 %arg, i1 zeroext %c1, i1 zeroext %c2, ptr %p) nounwind {
; CHECK-LABEL: test19:
; CHECK: # %bb.0: # %bb
; CHECK-NEXT: addi sp, sp, -16
; CHECK-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; CHECK-NEXT: sd s0, 0(sp) # 8-byte Folded Spill
; CHECK-NEXT: neg a0, a1
; CHECK-NEXT: li a1, 1
; CHECK-NEXT: slli a1, a1, 32
; CHECK-NEXT: addi s0, a1, 35
; CHECK-NEXT: and s0, a0, s0
; CHECK-NEXT: sd s0, 0(a3)
; CHECK-NEXT: beqz a2, .LBB23_2
; CHECK-NEXT: # %bb.1: # %bb2
; CHECK-NEXT: li a0, 0
; CHECK-NEXT: call bar@plt
; CHECK-NEXT: mv s0, a0
; CHECK-NEXT: .LBB23_2: # %bb7
; CHECK-NEXT: call side_effect@plt
; CHECK-NEXT: sext.w a0, s0
; CHECK-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; CHECK-NEXT: ld s0, 0(sp) # 8-byte Folded Reload
; CHECK-NEXT: addi sp, sp, 16
; CHECK-NEXT: ret
;
; NOREMOVAL-LABEL: test19:
; NOREMOVAL: # %bb.0: # %bb
; NOREMOVAL-NEXT: addi sp, sp, -16
; NOREMOVAL-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: sd s0, 0(sp) # 8-byte Folded Spill
; NOREMOVAL-NEXT: neg a0, a1
; NOREMOVAL-NEXT: li a1, 1
; NOREMOVAL-NEXT: slli a1, a1, 32
; NOREMOVAL-NEXT: addi s0, a1, 35
; NOREMOVAL-NEXT: and s0, a0, s0
; NOREMOVAL-NEXT: sd s0, 0(a3)
; NOREMOVAL-NEXT: beqz a2, .LBB23_2
; NOREMOVAL-NEXT: # %bb.1: # %bb2
; NOREMOVAL-NEXT: li a0, 0
; NOREMOVAL-NEXT: call bar@plt
; NOREMOVAL-NEXT: mv s0, a0
; NOREMOVAL-NEXT: .LBB23_2: # %bb7
; NOREMOVAL-NEXT: call side_effect@plt
; NOREMOVAL-NEXT: sext.w a0, s0
; NOREMOVAL-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: ld s0, 0(sp) # 8-byte Folded Reload
; NOREMOVAL-NEXT: addi sp, sp, 16
; NOREMOVAL-NEXT: ret
bb:
%sel = select i1 %c1, i64 4294967331, i64 0
store i64 %sel, ptr %p, align 8
br i1 %c2, label %bb2, label %bb7
bb2: ; preds = %bb2, %bb
%i4 = call signext i32 @bar(i32 0)
%i4.sext = sext i32 %i4 to i64
br label %bb7
bb7: ; preds = %bb2
%phi = phi i64 [ %sel, %bb ], [ %i4.sext, %bb2 ]
%trunc = trunc i64 %phi to i32
call void @side_effect()
ret i32 %trunc
}
declare void @side_effect(i64)