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llvm / llvm-project / llvm / b72b4128f221fd5086a1ae46aba7b2fcbf0d6384 / . / test / Transforms / InstCombine / trunc.ll
blob: e04bcaf073b64e44f0ffcc5f37cbf057dfa15e85 [file] [log] [blame]
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
; Instcombine should be able to eliminate all of these ext casts.
declare void @use(i32)
declare void @use_vec(<2 x i32>)
define i64 @test1(i64 %a) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: [[B:%.*]] = trunc i64 [[A:%.*]] to i32
; CHECK-NEXT: [[C:%.*]] = and i64 [[A]], 15
; CHECK-NEXT: call void @use(i32 [[B]])
; CHECK-NEXT: ret i64 [[C]]
;
%b = trunc i64 %a to i32
%c = and i32 %b, 15
%d = zext i32 %c to i64
call void @use(i32 %b)
ret i64 %d
}
define <2 x i64> @test1_vec(<2 x i64> %a) {
; CHECK-LABEL: @test1_vec(
; CHECK-NEXT: [[B:%.*]] = trunc <2 x i64> [[A:%.*]] to <2 x i32>
; CHECK-NEXT: [[D:%.*]] = and <2 x i64> [[A]], <i64 15, i64 15>
; CHECK-NEXT: call void @use_vec(<2 x i32> [[B]])
; CHECK-NEXT: ret <2 x i64> [[D]]
;
%b = trunc <2 x i64> %a to <2 x i32>
%c = and <2 x i32> %b, <i32 15, i32 15>
%d = zext <2 x i32> %c to <2 x i64>
call void @use_vec(<2 x i32> %b)
ret <2 x i64> %d
}
define <2 x i64> @test1_vec_nonuniform(<2 x i64> %a) {
; CHECK-LABEL: @test1_vec_nonuniform(
; CHECK-NEXT: [[B:%.*]] = trunc <2 x i64> [[A:%.*]] to <2 x i32>
; CHECK-NEXT: [[D:%.*]] = and <2 x i64> [[A]], <i64 15, i64 7>
; CHECK-NEXT: call void @use_vec(<2 x i32> [[B]])
; CHECK-NEXT: ret <2 x i64> [[D]]
;
%b = trunc <2 x i64> %a to <2 x i32>
%c = and <2 x i32> %b, <i32 15, i32 7>
%d = zext <2 x i32> %c to <2 x i64>
call void @use_vec(<2 x i32> %b)
ret <2 x i64> %d
}
define <2 x i64> @test1_vec_undef(<2 x i64> %a) {
; CHECK-LABEL: @test1_vec_undef(
; CHECK-NEXT: [[B:%.*]] = trunc <2 x i64> [[A:%.*]] to <2 x i32>
; CHECK-NEXT: [[D:%.*]] = and <2 x i64> [[A]], <i64 15, i64 0>
; CHECK-NEXT: call void @use_vec(<2 x i32> [[B]])
; CHECK-NEXT: ret <2 x i64> [[D]]
;
%b = trunc <2 x i64> %a to <2 x i32>
%c = and <2 x i32> %b, <i32 15, i32 undef>
%d = zext <2 x i32> %c to <2 x i64>
call void @use_vec(<2 x i32> %b)
ret <2 x i64> %d
}
define i64 @test2(i64 %a) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[B:%.*]] = trunc i64 [[A:%.*]] to i32
; CHECK-NEXT: [[D1:%.*]] = shl i64 [[A]], 36
; CHECK-NEXT: [[D:%.*]] = ashr exact i64 [[D1]], 36
; CHECK-NEXT: call void @use(i32 [[B]])
; CHECK-NEXT: ret i64 [[D]]
;
%b = trunc i64 %a to i32
%c = shl i32 %b, 4
%q = ashr i32 %c, 4
%d = sext i32 %q to i64
call void @use(i32 %b)
ret i64 %d
}
define <2 x i64> @test2_vec(<2 x i64> %a) {
; CHECK-LABEL: @test2_vec(
; CHECK-NEXT: [[B:%.*]] = trunc <2 x i64> [[A:%.*]] to <2 x i32>
; CHECK-NEXT: [[D1:%.*]] = shl <2 x i64> [[A]], <i64 36, i64 36>
; CHECK-NEXT: [[D:%.*]] = ashr exact <2 x i64> [[D1]], <i64 36, i64 36>
; CHECK-NEXT: call void @use_vec(<2 x i32> [[B]])
; CHECK-NEXT: ret <2 x i64> [[D]]
;
%b = trunc <2 x i64> %a to <2 x i32>
%c = shl <2 x i32> %b, <i32 4, i32 4>
%q = ashr <2 x i32> %c, <i32 4, i32 4>
%d = sext <2 x i32> %q to <2 x i64>
call void @use_vec(<2 x i32> %b)
ret <2 x i64> %d
}
define <2 x i64> @test2_vec_nonuniform(<2 x i64> %a) {
; CHECK-LABEL: @test2_vec_nonuniform(
; CHECK-NEXT: [[B:%.*]] = trunc <2 x i64> [[A:%.*]] to <2 x i32>
; CHECK-NEXT: [[D1:%.*]] = shl <2 x i64> [[A]], <i64 36, i64 37>
; CHECK-NEXT: [[D:%.*]] = ashr <2 x i64> [[D1]], <i64 36, i64 37>
; CHECK-NEXT: call void @use_vec(<2 x i32> [[B]])
; CHECK-NEXT: ret <2 x i64> [[D]]
;
%b = trunc <2 x i64> %a to <2 x i32>
%c = shl <2 x i32> %b, <i32 4, i32 5>
%q = ashr <2 x i32> %c, <i32 4, i32 5>
%d = sext <2 x i32> %q to <2 x i64>
call void @use_vec(<2 x i32> %b)
ret <2 x i64> %d
}
define <2 x i64> @test2_vec_undef(<2 x i64> %a) {
; CHECK-LABEL: @test2_vec_undef(
; CHECK-NEXT: [[B:%.*]] = trunc <2 x i64> [[A:%.*]] to <2 x i32>
; CHECK-NEXT: [[D1:%.*]] = shl <2 x i64> [[A]], <i64 36, i64 undef>
; CHECK-NEXT: [[D:%.*]] = ashr <2 x i64> [[D1]], <i64 36, i64 undef>
; CHECK-NEXT: call void @use_vec(<2 x i32> [[B]])
; CHECK-NEXT: ret <2 x i64> [[D]]
;
%b = trunc <2 x i64> %a to <2 x i32>
%c = shl <2 x i32> %b, <i32 4, i32 undef>
%q = ashr <2 x i32> %c, <i32 4, i32 undef>
%d = sext <2 x i32> %q to <2 x i64>
call void @use_vec(<2 x i32> %b)
ret <2 x i64> %d
}
define i64 @test3(i64 %a) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: [[B:%.*]] = trunc i64 [[A:%.*]] to i32
; CHECK-NEXT: [[C:%.*]] = and i64 [[A]], 8
; CHECK-NEXT: call void @use(i32 [[B]])
; CHECK-NEXT: ret i64 [[C]]
;
%b = trunc i64 %a to i32
%c = and i32 %b, 8
%d = zext i32 %c to i64
call void @use(i32 %b)
ret i64 %d
}
define i64 @test4(i64 %a) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[B:%.*]] = trunc i64 [[A:%.*]] to i32
; CHECK-NEXT: [[C:%.*]] = and i64 [[A]], 8
; CHECK-NEXT: [[X:%.*]] = xor i64 [[C]], 8
; CHECK-NEXT: call void @use(i32 [[B]])
; CHECK-NEXT: ret i64 [[X]]
;
%b = trunc i64 %a to i32
%c = and i32 %b, 8
%x = xor i32 %c, 8
%d = zext i32 %x to i64
call void @use(i32 %b)
ret i64 %d
}
define i32 @test5(i32 %A) {
; CHECK-LABEL: @test5(
; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[A:%.*]], 16
; CHECK-NEXT: ret i32 [[TMP1]]
;
%B = zext i32 %A to i128
%C = lshr i128 %B, 16
%D = trunc i128 %C to i32
ret i32 %D
}
define i32 @test6(i64 %A) {
; CHECK-LABEL: @test6(
; CHECK-NEXT: [[TMP1:%.*]] = lshr i64 [[A:%.*]], 32
; CHECK-NEXT: [[D:%.*]] = trunc i64 [[TMP1]] to i32
; CHECK-NEXT: ret i32 [[D]]
;
%B = zext i64 %A to i128
%C = lshr i128 %B, 32
%D = trunc i128 %C to i32
ret i32 %D
}
; Test case where 'ashr' demanded bits does not contain any of the high bits,
; but does contain sign bits, where the sign bit is not known to be zero.
define i16 @ashr_mul_sign_bits(i8 %X, i8 %Y) {
; CHECK-LABEL: @ashr_mul_sign_bits(
; CHECK-NEXT: [[A:%.*]] = sext i8 [[X:%.*]] to i16
; CHECK-NEXT: [[B:%.*]] = sext i8 [[Y:%.*]] to i16
; CHECK-NEXT: [[C:%.*]] = mul nsw i16 [[A]], [[B]]
; CHECK-NEXT: [[D:%.*]] = ashr i16 [[C]], 3
; CHECK-NEXT: ret i16 [[D]]
;
%A = sext i8 %X to i32
%B = sext i8 %Y to i32
%C = mul i32 %A, %B
%D = ashr i32 %C, 3
%E = trunc i32 %D to i16
ret i16 %E
}
define i16 @ashr_mul(i8 %X, i8 %Y) {
; CHECK-LABEL: @ashr_mul(
; CHECK-NEXT: [[A:%.*]] = sext i8 [[X:%.*]] to i16
; CHECK-NEXT: [[B:%.*]] = sext i8 [[Y:%.*]] to i16
; CHECK-NEXT: [[C:%.*]] = mul nsw i16 [[A]], [[B]]
; CHECK-NEXT: [[D:%.*]] = ashr i16 [[C]], 8
; CHECK-NEXT: ret i16 [[D]]
;
%A = sext i8 %X to i20
%B = sext i8 %Y to i20
%C = mul i20 %A, %B
%D = ashr i20 %C, 8
%E = trunc i20 %D to i16
ret i16 %E
}
define i32 @trunc_ashr(i32 %X) {
; CHECK-LABEL: @trunc_ashr(
; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[X:%.*]], 8
; CHECK-NEXT: [[C:%.*]] = or i32 [[TMP1]], -8388608
; CHECK-NEXT: ret i32 [[C]]
;
%A = zext i32 %X to i36
%B = or i36 %A, -2147483648 ; 0xF80000000
%C = ashr i36 %B, 8
%T = trunc i36 %C to i32
ret i32 %T
}
define <2 x i32> @trunc_ashr_vec(<2 x i32> %X) {
; CHECK-LABEL: @trunc_ashr_vec(
; CHECK-NEXT: [[TMP1:%.*]] = lshr <2 x i32> [[X:%.*]], <i32 8, i32 8>
; CHECK-NEXT: [[C:%.*]] = or <2 x i32> [[TMP1]], <i32 -8388608, i32 -8388608>
; CHECK-NEXT: ret <2 x i32> [[C]]
;
%A = zext <2 x i32> %X to <2 x i36>
%B = or <2 x i36> %A, <i36 -2147483648, i36 -2147483648> ; 0xF80000000
%C = ashr <2 x i36> %B, <i36 8, i36 8>
%T = trunc <2 x i36> %C to <2 x i32>
ret <2 x i32> %T
}
define i92 @test7(i64 %A) {
; CHECK-LABEL: @test7(
; CHECK-NEXT: [[TMP1:%.*]] = lshr i64 [[A:%.*]], 32
; CHECK-NEXT: [[D:%.*]] = zext i64 [[TMP1]] to i92
; CHECK-NEXT: ret i92 [[D]]
;
%B = zext i64 %A to i128
%C = lshr i128 %B, 32
%D = trunc i128 %C to i92
ret i92 %D
}
define i64 @test8(i32 %A, i32 %B) {
; CHECK-LABEL: @test8(
; CHECK-NEXT: [[C:%.*]] = zext i32 [[A:%.*]] to i64
; CHECK-NEXT: [[D:%.*]] = zext i32 [[B:%.*]] to i64
; CHECK-NEXT: [[E:%.*]] = shl nuw i64 [[D]], 32
; CHECK-NEXT: [[F:%.*]] = or i64 [[E]], [[C]]
; CHECK-NEXT: ret i64 [[F]]
;
%C = zext i32 %A to i128
%D = zext i32 %B to i128
%E = shl i128 %D, 32
%F = or i128 %E, %C
%G = trunc i128 %F to i64
ret i64 %G
}
define <2 x i64> @test8_vec(<2 x i32> %A, <2 x i32> %B) {
; CHECK-LABEL: @test8_vec(
; CHECK-NEXT: [[C:%.*]] = zext <2 x i32> [[A:%.*]] to <2 x i64>
; CHECK-NEXT: [[D:%.*]] = zext <2 x i32> [[B:%.*]] to <2 x i64>
; CHECK-NEXT: [[E:%.*]] = shl nuw <2 x i64> [[D]], <i64 32, i64 32>
; CHECK-NEXT: [[F:%.*]] = or <2 x i64> [[E]], [[C]]
; CHECK-NEXT: ret <2 x i64> [[F]]
;
%C = zext <2 x i32> %A to <2 x i128>
%D = zext <2 x i32> %B to <2 x i128>
%E = shl <2 x i128> %D, <i128 32, i128 32>
%F = or <2 x i128> %E, %C
%G = trunc <2 x i128> %F to <2 x i64>
ret <2 x i64> %G
}
define <2 x i64> @test8_vec_nonuniform(<2 x i32> %A, <2 x i32> %B) {
; CHECK-LABEL: @test8_vec_nonuniform(
; CHECK-NEXT: [[C:%.*]] = zext <2 x i32> [[A:%.*]] to <2 x i64>
; CHECK-NEXT: [[D:%.*]] = zext <2 x i32> [[B:%.*]] to <2 x i64>
; CHECK-NEXT: [[E:%.*]] = shl <2 x i64> [[D]], <i64 32, i64 48>
; CHECK-NEXT: [[F:%.*]] = or <2 x i64> [[E]], [[C]]
; CHECK-NEXT: ret <2 x i64> [[F]]
;
%C = zext <2 x i32> %A to <2 x i128>
%D = zext <2 x i32> %B to <2 x i128>
%E = shl <2 x i128> %D, <i128 32, i128 48>
%F = or <2 x i128> %E, %C
%G = trunc <2 x i128> %F to <2 x i64>
ret <2 x i64> %G
}
define <2 x i64> @test8_vec_undef(<2 x i32> %A, <2 x i32> %B) {
; CHECK-LABEL: @test8_vec_undef(
; CHECK-NEXT: [[C:%.*]] = zext <2 x i32> [[A:%.*]] to <2 x i128>
; CHECK-NEXT: [[D:%.*]] = zext <2 x i32> [[B:%.*]] to <2 x i128>
; CHECK-NEXT: [[E:%.*]] = shl <2 x i128> [[D]], <i128 32, i128 undef>
; CHECK-NEXT: [[F:%.*]] = or <2 x i128> [[E]], [[C]]
; CHECK-NEXT: [[G:%.*]] = trunc <2 x i128> [[F]] to <2 x i64>
; CHECK-NEXT: ret <2 x i64> [[G]]
;
%C = zext <2 x i32> %A to <2 x i128>
%D = zext <2 x i32> %B to <2 x i128>
%E = shl <2 x i128> %D, <i128 32, i128 undef>
%F = or <2 x i128> %E, %C
%G = trunc <2 x i128> %F to <2 x i64>
ret <2 x i64> %G
}
define i8 @test9(i32 %X) {
; CHECK-LABEL: @test9(
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 [[X:%.*]] to i8
; CHECK-NEXT: [[Z:%.*]] = and i8 [[TMP1]], 42
; CHECK-NEXT: ret i8 [[Z]]
;
%Y = and i32 %X, 42
%Z = trunc i32 %Y to i8
ret i8 %Z
}
; rdar://8808586
define i8 @test10(i32 %X) {
; CHECK-LABEL: @test10(
; CHECK-NEXT: [[Y:%.*]] = trunc i32 [[X:%.*]] to i8
; CHECK-NEXT: [[Z:%.*]] = and i8 [[Y]], 42
; CHECK-NEXT: ret i8 [[Z]]
;
%Y = trunc i32 %X to i8
%Z = and i8 %Y, 42
ret i8 %Z
}
define i64 @test11(i32 %A, i32 %B) {
; CHECK-LABEL: @test11(
; CHECK-NEXT: [[C:%.*]] = zext i32 [[A:%.*]] to i64
; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[B:%.*]], 31
; CHECK-NEXT: [[E:%.*]] = zext i32 [[TMP1]] to i64
; CHECK-NEXT: [[F:%.*]] = shl i64 [[C]], [[E]]
; CHECK-NEXT: ret i64 [[F]]
;
%C = zext i32 %A to i128
%D = zext i32 %B to i128
%E = and i128 %D, 31
%F = shl i128 %C, %E
%G = trunc i128 %F to i64
ret i64 %G
}
define <2 x i64> @test11_vec(<2 x i32> %A, <2 x i32> %B) {
; CHECK-LABEL: @test11_vec(
; CHECK-NEXT: [[C:%.*]] = zext <2 x i32> [[A:%.*]] to <2 x i64>
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> [[B:%.*]], <i32 31, i32 31>
; CHECK-NEXT: [[E:%.*]] = zext <2 x i32> [[TMP1]] to <2 x i64>
; CHECK-NEXT: [[F:%.*]] = shl <2 x i64> [[C]], [[E]]
; CHECK-NEXT: ret <2 x i64> [[F]]
;
%C = zext <2 x i32> %A to <2 x i128>
%D = zext <2 x i32> %B to <2 x i128>
%E = and <2 x i128> %D, <i128 31, i128 31>
%F = shl <2 x i128> %C, %E
%G = trunc <2 x i128> %F to <2 x i64>
ret <2 x i64> %G
}
define <2 x i64> @test11_vec_nonuniform(<2 x i32> %A, <2 x i32> %B) {
; CHECK-LABEL: @test11_vec_nonuniform(
; CHECK-NEXT: [[C:%.*]] = zext <2 x i32> [[A:%.*]] to <2 x i64>
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> [[B:%.*]], <i32 31, i32 15>
; CHECK-NEXT: [[E:%.*]] = zext <2 x i32> [[TMP1]] to <2 x i64>
; CHECK-NEXT: [[F:%.*]] = shl <2 x i64> [[C]], [[E]]
; CHECK-NEXT: ret <2 x i64> [[F]]
;
%C = zext <2 x i32> %A to <2 x i128>
%D = zext <2 x i32> %B to <2 x i128>
%E = and <2 x i128> %D, <i128 31, i128 15>
%F = shl <2 x i128> %C, %E
%G = trunc <2 x i128> %F to <2 x i64>
ret <2 x i64> %G
}
define <2 x i64> @test11_vec_undef(<2 x i32> %A, <2 x i32> %B) {
; CHECK-LABEL: @test11_vec_undef(
; CHECK-NEXT: [[C:%.*]] = zext <2 x i32> [[A:%.*]] to <2 x i128>
; CHECK-NEXT: [[D:%.*]] = zext <2 x i32> [[B:%.*]] to <2 x i128>
; CHECK-NEXT: [[E:%.*]] = and <2 x i128> [[D]], <i128 31, i128 undef>
; CHECK-NEXT: [[F:%.*]] = shl <2 x i128> [[C]], [[E]]
; CHECK-NEXT: [[G:%.*]] = trunc <2 x i128> [[F]] to <2 x i64>
; CHECK-NEXT: ret <2 x i64> [[G]]
;
%C = zext <2 x i32> %A to <2 x i128>
%D = zext <2 x i32> %B to <2 x i128>
%E = and <2 x i128> %D, <i128 31, i128 undef>
%F = shl <2 x i128> %C, %E
%G = trunc <2 x i128> %F to <2 x i64>
ret <2 x i64> %G
}
define i64 @test12(i32 %A, i32 %B) {
; CHECK-LABEL: @test12(
; CHECK-NEXT: [[C:%.*]] = zext i32 [[A:%.*]] to i64
; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[B:%.*]], 31
; CHECK-NEXT: [[E:%.*]] = zext i32 [[TMP1]] to i64
; CHECK-NEXT: [[F:%.*]] = lshr i64 [[C]], [[E]]
; CHECK-NEXT: ret i64 [[F]]
;
%C = zext i32 %A to i128
%D = zext i32 %B to i128
%E = and i128 %D, 31
%F = lshr i128 %C, %E
%G = trunc i128 %F to i64
ret i64 %G
}
define <2 x i64> @test12_vec(<2 x i32> %A, <2 x i32> %B) {
; CHECK-LABEL: @test12_vec(
; CHECK-NEXT: [[C:%.*]] = zext <2 x i32> [[A:%.*]] to <2 x i64>
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> [[B:%.*]], <i32 31, i32 31>
; CHECK-NEXT: [[E:%.*]] = zext <2 x i32> [[TMP1]] to <2 x i64>
; CHECK-NEXT: [[F:%.*]] = lshr <2 x i64> [[C]], [[E]]
; CHECK-NEXT: ret <2 x i64> [[F]]
;
%C = zext <2 x i32> %A to <2 x i128>
%D = zext <2 x i32> %B to <2 x i128>
%E = and <2 x i128> %D, <i128 31, i128 31>
%F = lshr <2 x i128> %C, %E
%G = trunc <2 x i128> %F to <2 x i64>
ret <2 x i64> %G
}
define <2 x i64> @test12_vec_nonuniform(<2 x i32> %A, <2 x i32> %B) {
; CHECK-LABEL: @test12_vec_nonuniform(
; CHECK-NEXT: [[C:%.*]] = zext <2 x i32> [[A:%.*]] to <2 x i64>
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> [[B:%.*]], <i32 31, i32 15>
; CHECK-NEXT: [[E:%.*]] = zext <2 x i32> [[TMP1]] to <2 x i64>
; CHECK-NEXT: [[F:%.*]] = lshr <2 x i64> [[C]], [[E]]
; CHECK-NEXT: ret <2 x i64> [[F]]
;
%C = zext <2 x i32> %A to <2 x i128>
%D = zext <2 x i32> %B to <2 x i128>
%E = and <2 x i128> %D, <i128 31, i128 15>
%F = lshr <2 x i128> %C, %E
%G = trunc <2 x i128> %F to <2 x i64>
ret <2 x i64> %G
}
define <2 x i64> @test12_vec_undef(<2 x i32> %A, <2 x i32> %B) {
; CHECK-LABEL: @test12_vec_undef(
; CHECK-NEXT: [[C:%.*]] = zext <2 x i32> [[A:%.*]] to <2 x i128>
; CHECK-NEXT: [[D:%.*]] = zext <2 x i32> [[B:%.*]] to <2 x i128>
; CHECK-NEXT: [[E:%.*]] = and <2 x i128> [[D]], <i128 31, i128 undef>
; CHECK-NEXT: [[F:%.*]] = lshr <2 x i128> [[C]], [[E]]
; CHECK-NEXT: [[G:%.*]] = trunc <2 x i128> [[F]] to <2 x i64>
; CHECK-NEXT: ret <2 x i64> [[G]]
;
%C = zext <2 x i32> %A to <2 x i128>
%D = zext <2 x i32> %B to <2 x i128>
%E = and <2 x i128> %D, <i128 31, i128 undef>
%F = lshr <2 x i128> %C, %E
%G = trunc <2 x i128> %F to <2 x i64>
ret <2 x i64> %G
}
define i64 @test13(i32 %A, i32 %B) {
; CHECK-LABEL: @test13(
; CHECK-NEXT: [[C:%.*]] = sext i32 [[A:%.*]] to i64
; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[B:%.*]], 31
; CHECK-NEXT: [[E:%.*]] = zext i32 [[TMP1]] to i64
; CHECK-NEXT: [[F:%.*]] = ashr i64 [[C]], [[E]]
; CHECK-NEXT: ret i64 [[F]]
;
%C = sext i32 %A to i128
%D = zext i32 %B to i128
%E = and i128 %D, 31
%F = ashr i128 %C, %E
%G = trunc i128 %F to i64
ret i64 %G
}
define <2 x i64> @test13_vec(<2 x i32> %A, <2 x i32> %B) {
; CHECK-LABEL: @test13_vec(
; CHECK-NEXT: [[C:%.*]] = sext <2 x i32> [[A:%.*]] to <2 x i64>
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> [[B:%.*]], <i32 31, i32 31>
; CHECK-NEXT: [[E:%.*]] = zext <2 x i32> [[TMP1]] to <2 x i64>
; CHECK-NEXT: [[F:%.*]] = ashr <2 x i64> [[C]], [[E]]
; CHECK-NEXT: ret <2 x i64> [[F]]
;
%C = sext <2 x i32> %A to <2 x i128>
%D = zext <2 x i32> %B to <2 x i128>
%E = and <2 x i128> %D, <i128 31, i128 31>
%F = ashr <2 x i128> %C, %E
%G = trunc <2 x i128> %F to <2 x i64>
ret <2 x i64> %G
}
define <2 x i64> @test13_vec_nonuniform(<2 x i32> %A, <2 x i32> %B) {
; CHECK-LABEL: @test13_vec_nonuniform(
; CHECK-NEXT: [[C:%.*]] = sext <2 x i32> [[A:%.*]] to <2 x i64>
; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i32> [[B:%.*]], <i32 31, i32 15>
; CHECK-NEXT: [[E:%.*]] = zext <2 x i32> [[TMP1]] to <2 x i64>
; CHECK-NEXT: [[F:%.*]] = ashr <2 x i64> [[C]], [[E]]
; CHECK-NEXT: ret <2 x i64> [[F]]
;
%C = sext <2 x i32> %A to <2 x i128>
%D = zext <2 x i32> %B to <2 x i128>
%E = and <2 x i128> %D, <i128 31, i128 15>
%F = ashr <2 x i128> %C, %E
%G = trunc <2 x i128> %F to <2 x i64>
ret <2 x i64> %G
}
define <2 x i64> @test13_vec_undef(<2 x i32> %A, <2 x i32> %B) {
; CHECK-LABEL: @test13_vec_undef(
; CHECK-NEXT: [[C:%.*]] = sext <2 x i32> [[A:%.*]] to <2 x i128>
; CHECK-NEXT: [[D:%.*]] = zext <2 x i32> [[B:%.*]] to <2 x i128>
; CHECK-NEXT: [[E:%.*]] = and <2 x i128> [[D]], <i128 31, i128 undef>
; CHECK-NEXT: [[F:%.*]] = ashr <2 x i128> [[C]], [[E]]
; CHECK-NEXT: [[G:%.*]] = trunc <2 x i128> [[F]] to <2 x i64>
; CHECK-NEXT: ret <2 x i64> [[G]]
;
%C = sext <2 x i32> %A to <2 x i128>
%D = zext <2 x i32> %B to <2 x i128>
%E = and <2 x i128> %D, <i128 31, i128 undef>
%F = ashr <2 x i128> %C, %E
%G = trunc <2 x i128> %F to <2 x i64>
ret <2 x i64> %G
}
; PR25543
; https://llvm.org/bugs/show_bug.cgi?id=25543
; This is an extractelement.
define i32 @trunc_bitcast1(<4 x i32> %v) {
; CHECK-LABEL: @trunc_bitcast1(
; CHECK-NEXT: [[EXT:%.*]] = extractelement <4 x i32> [[V:%.*]], i64 1
; CHECK-NEXT: ret i32 [[EXT]]
;
%bc = bitcast <4 x i32> %v to i128
%shr = lshr i128 %bc, 32
%ext = trunc i128 %shr to i32
ret i32 %ext
}
; A bitcast may still be required.
define i32 @trunc_bitcast2(<2 x i64> %v) {
; CHECK-LABEL: @trunc_bitcast2(
; CHECK-NEXT: [[BC1:%.*]] = bitcast <2 x i64> [[V:%.*]] to <4 x i32>
; CHECK-NEXT: [[EXT:%.*]] = extractelement <4 x i32> [[BC1]], i64 2
; CHECK-NEXT: ret i32 [[EXT]]
;
%bc = bitcast <2 x i64> %v to i128
%shr = lshr i128 %bc, 64
%ext = trunc i128 %shr to i32
ret i32 %ext
}
; The right shift is optional.
define i32 @trunc_bitcast3(<4 x i32> %v) {
; CHECK-LABEL: @trunc_bitcast3(
; CHECK-NEXT: [[EXT:%.*]] = extractelement <4 x i32> [[V:%.*]], i64 0
; CHECK-NEXT: ret i32 [[EXT]]
;
%bc = bitcast <4 x i32> %v to i128
%ext = trunc i128 %bc to i32
ret i32 %ext
}
define i32 @trunc_shl_31_i32_i64(i64 %val) {
; CHECK-LABEL: @trunc_shl_31_i32_i64(
; CHECK-NEXT: [[VAL_TR:%.*]] = trunc i64 [[VAL:%.*]] to i32
; CHECK-NEXT: [[TRUNC:%.*]] = shl i32 [[VAL_TR]], 31
; CHECK-NEXT: ret i32 [[TRUNC]]
;
%shl = shl i64 %val, 31
%trunc = trunc i64 %shl to i32
ret i32 %trunc
}
define i32 @trunc_shl_nsw_31_i32_i64(i64 %val) {
; CHECK-LABEL: @trunc_shl_nsw_31_i32_i64(
; CHECK-NEXT: [[VAL_TR:%.*]] = trunc i64 [[VAL:%.*]] to i32
; CHECK-NEXT: [[TRUNC:%.*]] = shl i32 [[VAL_TR]], 31
; CHECK-NEXT: ret i32 [[TRUNC]]
;
%shl = shl nsw i64 %val, 31
%trunc = trunc i64 %shl to i32
ret i32 %trunc
}
define i32 @trunc_shl_nuw_31_i32_i64(i64 %val) {
; CHECK-LABEL: @trunc_shl_nuw_31_i32_i64(
; CHECK-NEXT: [[VAL_TR:%.*]] = trunc i64 [[VAL:%.*]] to i32
; CHECK-NEXT: [[TRUNC:%.*]] = shl i32 [[VAL_TR]], 31
; CHECK-NEXT: ret i32 [[TRUNC]]
;
%shl = shl nuw i64 %val, 31
%trunc = trunc i64 %shl to i32
ret i32 %trunc
}
define i32 @trunc_shl_nsw_nuw_31_i32_i64(i64 %val) {
; CHECK-LABEL: @trunc_shl_nsw_nuw_31_i32_i64(
; CHECK-NEXT: [[VAL_TR:%.*]] = trunc i64 [[VAL:%.*]] to i32
; CHECK-NEXT: [[TRUNC:%.*]] = shl i32 [[VAL_TR]], 31
; CHECK-NEXT: ret i32 [[TRUNC]]
;
%shl = shl nsw nuw i64 %val, 31
%trunc = trunc i64 %shl to i32
ret i32 %trunc
}
define i16 @trunc_shl_15_i16_i64(i64 %val) {
; CHECK-LABEL: @trunc_shl_15_i16_i64(
; CHECK-NEXT: [[VAL_TR:%.*]] = trunc i64 [[VAL:%.*]] to i16
; CHECK-NEXT: [[TRUNC:%.*]] = shl i16 [[VAL_TR]], 15
; CHECK-NEXT: ret i16 [[TRUNC]]
;
%shl = shl i64 %val, 15
%trunc = trunc i64 %shl to i16
ret i16 %trunc
}
define i16 @trunc_shl_15_i16_i32(i32 %val) {
; CHECK-LABEL: @trunc_shl_15_i16_i32(
; CHECK-NEXT: [[VAL_TR:%.*]] = trunc i32 [[VAL:%.*]] to i16
; CHECK-NEXT: [[TRUNC:%.*]] = shl i16 [[VAL_TR]], 15
; CHECK-NEXT: ret i16 [[TRUNC]]
;
%shl = shl i32 %val, 15
%trunc = trunc i32 %shl to i16
ret i16 %trunc
}
define i8 @trunc_shl_7_i8_i64(i64 %val) {
; CHECK-LABEL: @trunc_shl_7_i8_i64(
; CHECK-NEXT: [[VAL_TR:%.*]] = trunc i64 [[VAL:%.*]] to i8
; CHECK-NEXT: [[TRUNC:%.*]] = shl i8 [[VAL_TR]], 7
; CHECK-NEXT: ret i8 [[TRUNC]]
;
%shl = shl i64 %val, 7
%trunc = trunc i64 %shl to i8
ret i8 %trunc
}
define i2 @trunc_shl_1_i2_i64(i64 %val) {
; CHECK-LABEL: @trunc_shl_1_i2_i64(
; CHECK-NEXT: [[SHL:%.*]] = shl i64 [[VAL:%.*]], 1
; CHECK-NEXT: [[TRUNC:%.*]] = trunc i64 [[SHL]] to i2
; CHECK-NEXT: ret i2 [[TRUNC]]
;
%shl = shl i64 %val, 1
%trunc = trunc i64 %shl to i2
ret i2 %trunc
}
define i32 @trunc_shl_1_i32_i64(i64 %val) {
; CHECK-LABEL: @trunc_shl_1_i32_i64(
; CHECK-NEXT: [[VAL_TR:%.*]] = trunc i64 [[VAL:%.*]] to i32
; CHECK-NEXT: [[TRUNC:%.*]] = shl i32 [[VAL_TR]], 1
; CHECK-NEXT: ret i32 [[TRUNC]]
;
%shl = shl i64 %val, 1
%trunc = trunc i64 %shl to i32
ret i32 %trunc
}
define i32 @trunc_shl_16_i32_i64(i64 %val) {
; CHECK-LABEL: @trunc_shl_16_i32_i64(
; CHECK-NEXT: [[VAL_TR:%.*]] = trunc i64 [[VAL:%.*]] to i32
; CHECK-NEXT: [[TRUNC:%.*]] = shl i32 [[VAL_TR]], 16
; CHECK-NEXT: ret i32 [[TRUNC]]
;
%shl = shl i64 %val, 16
%trunc = trunc i64 %shl to i32
ret i32 %trunc
}
define i32 @trunc_shl_33_i32_i64(i64 %val) {
; CHECK-LABEL: @trunc_shl_33_i32_i64(
; CHECK-NEXT: ret i32 0
;
%shl = shl i64 %val, 33
%trunc = trunc i64 %shl to i32
ret i32 %trunc
}
define i32 @trunc_shl_32_i32_i64(i64 %val) {
; CHECK-LABEL: @trunc_shl_32_i32_i64(
; CHECK-NEXT: ret i32 0
;
%shl = shl i64 %val, 32
%trunc = trunc i64 %shl to i32
ret i32 %trunc
}
; Should be able to handle vectors
define <2 x i32> @trunc_shl_16_v2i32_v2i64(<2 x i64> %val) {
; CHECK-LABEL: @trunc_shl_16_v2i32_v2i64(
; CHECK-NEXT: [[VAL_TR:%.*]] = trunc <2 x i64> [[VAL:%.*]] to <2 x i32>
; CHECK-NEXT: [[TRUNC:%.*]] = shl <2 x i32> [[VAL_TR]], <i32 16, i32 16>
; CHECK-NEXT: ret <2 x i32> [[TRUNC]]
;
%shl = shl <2 x i64> %val, <i64 16, i64 16>
%trunc = trunc <2 x i64> %shl to <2 x i32>
ret <2 x i32> %trunc
}
define <2 x i32> @trunc_shl_nosplat_v2i32_v2i64(<2 x i64> %val) {
; CHECK-LABEL: @trunc_shl_nosplat_v2i32_v2i64(
; CHECK-NEXT: [[VAL_TR:%.*]] = trunc <2 x i64> [[VAL:%.*]] to <2 x i32>
; CHECK-NEXT: [[TRUNC:%.*]] = shl <2 x i32> [[VAL_TR]], <i32 15, i32 16>
; CHECK-NEXT: ret <2 x i32> [[TRUNC]]
;
%shl = shl <2 x i64> %val, <i64 15, i64 16>
%trunc = trunc <2 x i64> %shl to <2 x i32>
ret <2 x i32> %trunc
}
define void @trunc_shl_31_i32_i64_multi_use(i64 %val, ptr addrspace(1) %ptr0, ptr addrspace(1) %ptr1) {
; CHECK-LABEL: @trunc_shl_31_i32_i64_multi_use(
; CHECK-NEXT: [[SHL:%.*]] = shl i64 [[VAL:%.*]], 31
; CHECK-NEXT: [[TRUNC:%.*]] = trunc i64 [[SHL]] to i32
; CHECK-NEXT: store volatile i32 [[TRUNC]], ptr addrspace(1) [[PTR0:%.*]], align 4
; CHECK-NEXT: store volatile i64 [[SHL]], ptr addrspace(1) [[PTR1:%.*]], align 8
; CHECK-NEXT: ret void
;
%shl = shl i64 %val, 31
%trunc = trunc i64 %shl to i32
store volatile i32 %trunc, ptr addrspace(1) %ptr0
store volatile i64 %shl, ptr addrspace(1) %ptr1
ret void
}
define i32 @trunc_shl_lshr_infloop(i64 %arg) {
; CHECK-LABEL: @trunc_shl_lshr_infloop(
; CHECK-NEXT: [[ARG_TR:%.*]] = trunc i64 [[ARG:%.*]] to i32
; CHECK-NEXT: [[TMP1:%.*]] = shl i32 [[ARG_TR]], 1
; CHECK-NEXT: [[C:%.*]] = and i32 [[TMP1]], -4
; CHECK-NEXT: ret i32 [[C]]
;
%A = lshr i64 %arg, 1
%B = shl i64 %A, 2
%C = trunc i64 %B to i32
ret i32 %C
}
define <2 x i32> @trunc_shl_v2i32_v2i64_uniform(<2 x i64> %val) {
; CHECK-LABEL: @trunc_shl_v2i32_v2i64_uniform(
; CHECK-NEXT: [[VAL_TR:%.*]] = trunc <2 x i64> [[VAL:%.*]] to <2 x i32>
; CHECK-NEXT: [[TRUNC:%.*]] = shl <2 x i32> [[VAL_TR]], <i32 31, i32 31>
; CHECK-NEXT: ret <2 x i32> [[TRUNC]]
;
%shl = shl <2 x i64> %val, <i64 31, i64 31>
%trunc = trunc <2 x i64> %shl to <2 x i32>
ret <2 x i32> %trunc
}
define <2 x i32> @trunc_shl_v2i32_v2i64_undef(<2 x i64> %val) {
; CHECK-LABEL: @trunc_shl_v2i32_v2i64_undef(
; CHECK-NEXT: [[VAL_TR:%.*]] = trunc <2 x i64> [[VAL:%.*]] to <2 x i32>
; CHECK-NEXT: [[TRUNC:%.*]] = shl <2 x i32> [[VAL_TR]], <i32 31, i32 undef>
; CHECK-NEXT: ret <2 x i32> [[TRUNC]]
;
%shl = shl <2 x i64> %val, <i64 31, i64 undef>
%trunc = trunc <2 x i64> %shl to <2 x i32>
ret <2 x i32> %trunc
}
define <2 x i32> @trunc_shl_v2i32_v2i64_nonuniform(<2 x i64> %val) {
; CHECK-LABEL: @trunc_shl_v2i32_v2i64_nonuniform(
; CHECK-NEXT: [[VAL_TR:%.*]] = trunc <2 x i64> [[VAL:%.*]] to <2 x i32>
; CHECK-NEXT: [[TRUNC:%.*]] = shl <2 x i32> [[VAL_TR]], <i32 31, i32 12>
; CHECK-NEXT: ret <2 x i32> [[TRUNC]]
;
%shl = shl <2 x i64> %val, <i64 31, i64 12>
%trunc = trunc <2 x i64> %shl to <2 x i32>
ret <2 x i32> %trunc
}
define <2 x i32> @trunc_shl_v2i32_v2i64_outofrange(<2 x i64> %val) {
; CHECK-LABEL: @trunc_shl_v2i32_v2i64_outofrange(
; CHECK-NEXT: [[SHL:%.*]] = shl <2 x i64> [[VAL:%.*]], <i64 31, i64 33>
; CHECK-NEXT: [[TRUNC:%.*]] = trunc <2 x i64> [[SHL]] to <2 x i32>
; CHECK-NEXT: ret <2 x i32> [[TRUNC]]
;
%shl = shl <2 x i64> %val, <i64 31, i64 33>
%trunc = trunc <2 x i64> %shl to <2 x i32>
ret <2 x i32> %trunc
}
define i32 @trunc_shl_ashr_infloop(i64 %arg) {
; CHECK-LABEL: @trunc_shl_ashr_infloop(
; CHECK-NEXT: [[TMP1:%.*]] = lshr i64 [[ARG:%.*]], 1
; CHECK-NEXT: [[TMP2:%.*]] = trunc i64 [[TMP1]] to i32
; CHECK-NEXT: [[C:%.*]] = and i32 [[TMP2]], -4
; CHECK-NEXT: ret i32 [[C]]
;
%A = ashr i64 %arg, 3
%B = shl i64 %A, 2
%C = trunc i64 %B to i32
ret i32 %C
}
define i32 @trunc_shl_shl_infloop(i64 %arg) {
; CHECK-LABEL: @trunc_shl_shl_infloop(
; CHECK-NEXT: [[ARG_TR:%.*]] = trunc i64 [[ARG:%.*]] to i32
; CHECK-NEXT: [[C:%.*]] = shl i32 [[ARG_TR]], 3
; CHECK-NEXT: ret i32 [[C]]
;
%A = shl i64 %arg, 1
%B = shl i64 %A, 2
%C = trunc i64 %B to i32
ret i32 %C
}
define i32 @trunc_shl_lshr_var(i64 %arg, i64 %val) {
; CHECK-LABEL: @trunc_shl_lshr_var(
; CHECK-NEXT: [[A:%.*]] = lshr i64 [[ARG:%.*]], [[VAL:%.*]]
; CHECK-NEXT: [[A_TR:%.*]] = trunc i64 [[A]] to i32
; CHECK-NEXT: [[C:%.*]] = shl i32 [[A_TR]], 2
; CHECK-NEXT: ret i32 [[C]]
;
%A = lshr i64 %arg, %val
%B = shl i64 %A, 2
%C = trunc i64 %B to i32
ret i32 %C
}
define i32 @trunc_shl_ashr_var(i64 %arg, i64 %val) {
; CHECK-LABEL: @trunc_shl_ashr_var(
; CHECK-NEXT: [[A:%.*]] = ashr i64 [[ARG:%.*]], [[VAL:%.*]]
; CHECK-NEXT: [[A_TR:%.*]] = trunc i64 [[A]] to i32
; CHECK-NEXT: [[C:%.*]] = shl i32 [[A_TR]], 2
; CHECK-NEXT: ret i32 [[C]]
;
%A = ashr i64 %arg, %val
%B = shl i64 %A, 2
%C = trunc i64 %B to i32
ret i32 %C
}
define i32 @trunc_shl_shl_var(i64 %arg, i64 %val) {
; CHECK-LABEL: @trunc_shl_shl_var(
; CHECK-NEXT: [[A:%.*]] = shl i64 [[ARG:%.*]], [[VAL:%.*]]
; CHECK-NEXT: [[A_TR:%.*]] = trunc i64 [[A]] to i32
; CHECK-NEXT: [[C:%.*]] = shl i32 [[A_TR]], 2
; CHECK-NEXT: ret i32 [[C]]
;
%A = shl i64 %arg, %val
%B = shl i64 %A, 2
%C = trunc i64 %B to i32
ret i32 %C
}
define <8 x i16> @trunc_shl_v8i15_v8i32_15(<8 x i32> %a) {
; CHECK-LABEL: @trunc_shl_v8i15_v8i32_15(
; CHECK-NEXT: [[A_TR:%.*]] = trunc <8 x i32> [[A:%.*]] to <8 x i16>
; CHECK-NEXT: [[CONV:%.*]] = shl <8 x i16> [[A_TR]], <i16 15, i16 15, i16 15, i16 15, i16 15, i16 15, i16 15, i16 15>
; CHECK-NEXT: ret <8 x i16> [[CONV]]
;
%shl = shl <8 x i32> %a, <i32 15, i32 15, i32 15, i32 15, i32 15, i32 15, i32 15, i32 15>
%conv = trunc <8 x i32> %shl to <8 x i16>
ret <8 x i16> %conv
}
define <8 x i16> @trunc_shl_v8i16_v8i32_16(<8 x i32> %a) {
; CHECK-LABEL: @trunc_shl_v8i16_v8i32_16(
; CHECK-NEXT: ret <8 x i16> zeroinitializer
;
%shl = shl <8 x i32> %a, <i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16>
%conv = trunc <8 x i32> %shl to <8 x i16>
ret <8 x i16> %conv
}
define <8 x i16> @trunc_shl_v8i16_v8i32_17(<8 x i32> %a) {
; CHECK-LABEL: @trunc_shl_v8i16_v8i32_17(
; CHECK-NEXT: ret <8 x i16> zeroinitializer
;
%shl = shl <8 x i32> %a, <i32 17, i32 17, i32 17, i32 17, i32 17, i32 17, i32 17, i32 17>
%conv = trunc <8 x i32> %shl to <8 x i16>
ret <8 x i16> %conv
}
define <8 x i16> @trunc_shl_v8i16_v8i32_4(<8 x i32> %a) {
; CHECK-LABEL: @trunc_shl_v8i16_v8i32_4(
; CHECK-NEXT: [[A_TR:%.*]] = trunc <8 x i32> [[A:%.*]] to <8 x i16>
; CHECK-NEXT: [[CONV:%.*]] = shl <8 x i16> [[A_TR]], <i16 4, i16 4, i16 4, i16 4, i16 4, i16 4, i16 4, i16 4>
; CHECK-NEXT: ret <8 x i16> [[CONV]]
;
%shl = shl <8 x i32> %a, <i32 4, i32 4, i32 4, i32 4, i32 4, i32 4, i32 4, i32 4>
%conv = trunc <8 x i32> %shl to <8 x i16>
ret <8 x i16> %conv
}
; Although the mask is the same value, we don't create a shuffle for types that the backend may not be able to handle:
; trunc (shuffle X, C, Mask) --> shuffle (trunc X), C', Mask
define <4 x i8> @wide_shuf(<4 x i32> %x) {
; CHECK-LABEL: @wide_shuf(
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i32> [[X:%.*]], <4 x i32> <i32 poison, i32 3634, i32 90, i32 poison>, <4 x i32> <i32 1, i32 5, i32 6, i32 2>
; CHECK-NEXT: [[TRUNC:%.*]] = trunc <4 x i32> [[SHUF]] to <4 x i8>
; CHECK-NEXT: ret <4 x i8> [[TRUNC]]
;
%shuf = shufflevector <4 x i32> %x, <4 x i32> <i32 35, i32 3634, i32 90, i32 -1>, <4 x i32> <i32 1, i32 5, i32 6, i32 2>
%trunc = trunc <4 x i32> %shuf to <4 x i8>
ret <4 x i8> %trunc
}
; trunc (shuffle X, undef, SplatMask) --> shuffle (trunc X), undef, SplatMask
define <4 x i8> @wide_splat1(<4 x i32> %x) {
; CHECK-LABEL: @wide_splat1(
; CHECK-NEXT: [[TMP1:%.*]] = trunc <4 x i32> [[X:%.*]] to <4 x i8>
; CHECK-NEXT: [[TRUNC:%.*]] = shufflevector <4 x i8> [[TMP1]], <4 x i8> poison, <4 x i32> <i32 2, i32 2, i32 2, i32 2>
; CHECK-NEXT: ret <4 x i8> [[TRUNC]]
;
%shuf = shufflevector <4 x i32> %x, <4 x i32> undef, <4 x i32> <i32 2, i32 2, i32 2, i32 2>
%trunc = trunc <4 x i32> %shuf to <4 x i8>
ret <4 x i8> %trunc
}
; Test weird types.
; trunc (shuffle X, undef, SplatMask) --> shuffle (trunc X), undef, SplatMask
define <3 x i31> @wide_splat2(<3 x i33> %x) {
; CHECK-LABEL: @wide_splat2(
; CHECK-NEXT: [[TMP1:%.*]] = trunc <3 x i33> [[X:%.*]] to <3 x i31>
; CHECK-NEXT: [[TRUNC:%.*]] = shufflevector <3 x i31> [[TMP1]], <3 x i31> poison, <3 x i32> <i32 1, i32 1, i32 1>
; CHECK-NEXT: ret <3 x i31> [[TRUNC]]
;
%shuf = shufflevector <3 x i33> %x, <3 x i33> undef, <3 x i32> <i32 1, i32 1, i32 1>
%trunc = trunc <3 x i33> %shuf to <3 x i31>
ret <3 x i31> %trunc
}
; FIXME:
; trunc (shuffle X, undef, SplatMask) --> shuffle (trunc X), undef, SplatMask
; A mask with undef elements should still be considered a splat mask.
define <3 x i31> @wide_splat3(<3 x i33> %x) {
; CHECK-LABEL: @wide_splat3(
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <3 x i33> [[X:%.*]], <3 x i33> undef, <3 x i32> <i32 poison, i32 1, i32 1>
; CHECK-NEXT: [[TRUNC:%.*]] = trunc <3 x i33> [[SHUF]] to <3 x i31>
; CHECK-NEXT: ret <3 x i31> [[TRUNC]]
;
%shuf = shufflevector <3 x i33> %x, <3 x i33> undef, <3 x i32> <i32 undef, i32 1, i32 1>
%trunc = trunc <3 x i33> %shuf to <3 x i31>
ret <3 x i31> %trunc
}
; TODO: The shuffle extends the length of the input vector. Should we shrink this?
define <8 x i8> @wide_lengthening_splat(<4 x i16> %v) {
; CHECK-LABEL: @wide_lengthening_splat(
; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <4 x i16> [[V:%.*]], <4 x i16> poison, <8 x i32> zeroinitializer
; CHECK-NEXT: [[TR:%.*]] = trunc <8 x i16> [[SHUF]] to <8 x i8>
; CHECK-NEXT: ret <8 x i8> [[TR]]
;
%shuf = shufflevector <4 x i16> %v, <4 x i16> %v, <8 x i32> zeroinitializer
%tr = trunc <8 x i16> %shuf to <8 x i8>
ret <8 x i8> %tr
}
define <2 x i8> @narrow_add_vec_constant(<2 x i32> %x) {
; CHECK-LABEL: @narrow_add_vec_constant(
; CHECK-NEXT: [[TMP1:%.*]] = trunc <2 x i32> [[X:%.*]] to <2 x i8>
; CHECK-NEXT: [[TR:%.*]] = add <2 x i8> [[TMP1]], <i8 0, i8 127>
; CHECK-NEXT: ret <2 x i8> [[TR]]
;
%add = add <2 x i32> %x, <i32 256, i32 -129>
%tr = trunc <2 x i32> %add to <2 x i8>
ret <2 x i8> %tr
}
define <2 x i8> @narrow_mul_vec_constant(<2 x i32> %x) {
; CHECK-LABEL: @narrow_mul_vec_constant(
; CHECK-NEXT: [[TMP1:%.*]] = trunc <2 x i32> [[X:%.*]] to <2 x i8>
; CHECK-NEXT: [[TR:%.*]] = mul <2 x i8> [[TMP1]], <i8 0, i8 127>
; CHECK-NEXT: ret <2 x i8> [[TR]]
;
%add = mul <2 x i32> %x, <i32 256, i32 -129>
%tr = trunc <2 x i32> %add to <2 x i8>
ret <2 x i8> %tr
}
define <2 x i8> @narrow_sub_vec_constant(<2 x i32> %x) {
; CHECK-LABEL: @narrow_sub_vec_constant(
; CHECK-NEXT: [[TMP1:%.*]] = trunc <2 x i32> [[X:%.*]] to <2 x i8>
; CHECK-NEXT: [[TR:%.*]] = sub <2 x i8> <i8 0, i8 127>, [[TMP1]]
; CHECK-NEXT: ret <2 x i8> [[TR]]
;
%sub = sub <2 x i32> <i32 256, i32 -129>, %x
%tr = trunc <2 x i32> %sub to <2 x i8>
ret <2 x i8> %tr
}
; If the select is narrowed based on the target's datalayout, we allow more optimizations.
define i16 @PR44545(i32 %t0, i32 %data) {
; CHECK-LABEL: @PR44545(
; CHECK-NEXT: [[ISZERO:%.*]] = icmp eq i32 [[DATA:%.*]], 0
; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 [[T0:%.*]] to i16
; CHECK-NEXT: [[SUB:%.*]] = select i1 [[ISZERO]], i16 -1, i16 [[TMP1]]
; CHECK-NEXT: ret i16 [[SUB]]
;
%t1 = add nuw nsw i32 %t0, 1
%iszero = icmp eq i32 %data, 0
%ffs = select i1 %iszero, i32 0, i32 %t1
%cast = trunc i32 %ffs to i16
%sub = add nsw i16 %cast, -1
ret i16 %sub
}