| # RUN: llc -mtriple=hexagon -run-pass pipeliner -debug-only=pipeliner %s -o /dev/null 2>&1 -pipeliner-experimental-cg=true | FileCheck %s |
| # REQUIRES: asserts |
| |
| # Test that the loop carried dependence check correctly identifies a recurrence |
| # when the loop variable decreases and the array index offset is negative. |
| |
| # CHECK: Rec NodeSet |
| # CHECK: Rec NodeSet |
| # CHECK: SU(3) |
| # CHECK: SU(4) |
| # CHECK: SU(5) |
| |
| --- | |
| |
| define void @test() { |
| b0: |
| br label %b3 |
| |
| b3: |
| %lsr.iv = phi [9 x i32]* [ %0, %b3 ], [ undef, %b0 ] |
| %v0 = phi i32 [ %v8, %b3 ], [ 7, %b0 ] |
| %v1 = phi i32 [ %v6, %b3 ], [ undef, %b0 ] |
| %v2 = phi i32 [ %v1, %b3 ], [ undef, %b0 ] |
| %lsr.iv1 = bitcast [9 x i32]* %lsr.iv to i32* |
| %cgep = getelementptr i32, i32* %lsr.iv1, i32 -2 |
| %v6 = load i32, i32* %cgep, align 4 |
| %v7 = tail call i32 @llvm.hexagon.A2.subsat(i32 %v2, i32 %v6) |
| store i32 %v7, i32* %lsr.iv1, align 4 |
| %v8 = add i32 %v0, -1 |
| %cgep3 = getelementptr [9 x i32], [9 x i32]* %lsr.iv, i32 0, i32 -1 |
| %0 = bitcast i32* %cgep3 to [9 x i32]* |
| %v9 = icmp sgt i32 %v8, 1 |
| br i1 %v9, label %b3, label %b4 |
| |
| b4: |
| unreachable |
| } |
| |
| declare i32 @llvm.hexagon.A2.subsat(i32, i32) #0 |
| declare void @llvm.stackprotector(i8*, i8**) #1 |
| |
| ... |
| --- |
| name: test |
| tracksRegLiveness: true |
| |
| body: | |
| bb.0: |
| successors: %bb.1 |
| |
| %10:intregs = IMPLICIT_DEF |
| %11:intregs = IMPLICIT_DEF |
| J2_loop0i %bb.1, 6, implicit-def $lc0, implicit-def $sa0, implicit-def $usr |
| |
| bb.1 (address-taken): |
| successors: %bb.1, %bb.2 |
| |
| %0:intregs = PHI %11, %bb.0, %6, %bb.1 |
| %2:intregs = PHI %10, %bb.0, %4, %bb.1 |
| %3:intregs = PHI %10, %bb.0, %2, %bb.1 |
| %4:intregs = L2_loadri_io %0, -8 :: (load 4 from %ir.cgep) |
| %12:intregs = A2_subsat %3, %4, implicit-def dead $usr_ovf |
| S2_storeri_io %0, 0, %12 :: (store 4 into %ir.lsr.iv1) |
| %6:intregs = A2_addi %0, -4 |
| ENDLOOP0 %bb.1, implicit-def $pc, implicit-def $lc0, implicit $sa0, implicit $lc0 |
| J2_jump %bb.2, implicit-def dead $pc |
| |
| bb.2: |
| |
| ... |