149 lines
4.1 KiB
LLVM
149 lines
4.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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define i32 @t0(i64 %x) {
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; CHECK-LABEL: @t0(
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; CHECK-NEXT: [[T0_NEG:%.*]] = ashr i64 [[X:%.*]], 63
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; CHECK-NEXT: [[T1_NEG:%.*]] = trunc i64 [[T0_NEG]] to i32
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; CHECK-NEXT: ret i32 [[T1_NEG]]
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;
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%t0 = lshr i64 %x, 63
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%t1 = trunc i64 %t0 to i32
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%r = sub i32 0, %t1
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ret i32 %r
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}
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define i32 @t1_exact(i64 %x) {
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; CHECK-LABEL: @t1_exact(
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; CHECK-NEXT: [[T0_NEG:%.*]] = ashr exact i64 [[X:%.*]], 63
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; CHECK-NEXT: [[T1_NEG:%.*]] = trunc i64 [[T0_NEG]] to i32
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; CHECK-NEXT: ret i32 [[T1_NEG]]
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;
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%t0 = lshr exact i64 %x, 63
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%t1 = trunc i64 %t0 to i32
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%r = sub i32 0, %t1
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ret i32 %r
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}
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define i32 @t2(i64 %x) {
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; CHECK-LABEL: @t2(
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; CHECK-NEXT: [[T0_NEG:%.*]] = lshr i64 [[X:%.*]], 63
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; CHECK-NEXT: [[T1_NEG:%.*]] = trunc i64 [[T0_NEG]] to i32
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; CHECK-NEXT: ret i32 [[T1_NEG]]
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;
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%t0 = ashr i64 %x, 63
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%t1 = trunc i64 %t0 to i32
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%r = sub i32 0, %t1
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ret i32 %r
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}
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define i32 @t3_exact(i64 %x) {
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; CHECK-LABEL: @t3_exact(
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; CHECK-NEXT: [[T0_NEG:%.*]] = lshr exact i64 [[X:%.*]], 63
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; CHECK-NEXT: [[T1_NEG:%.*]] = trunc i64 [[T0_NEG]] to i32
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; CHECK-NEXT: ret i32 [[T1_NEG]]
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;
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%t0 = ashr exact i64 %x, 63
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%t1 = trunc i64 %t0 to i32
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%r = sub i32 0, %t1
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ret i32 %r
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}
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define <2 x i32> @t4(<2 x i64> %x) {
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; CHECK-LABEL: @t4(
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; CHECK-NEXT: [[T0_NEG:%.*]] = ashr <2 x i64> [[X:%.*]], <i64 63, i64 63>
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; CHECK-NEXT: [[T1_NEG:%.*]] = trunc <2 x i64> [[T0_NEG]] to <2 x i32>
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; CHECK-NEXT: ret <2 x i32> [[T1_NEG]]
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;
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%t0 = lshr <2 x i64> %x, <i64 63, i64 63>
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%t1 = trunc <2 x i64> %t0 to <2 x i32>
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%r = sub <2 x i32> zeroinitializer, %t1
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ret <2 x i32> %r
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}
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define <2 x i32> @t5(<2 x i64> %x) {
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; CHECK-LABEL: @t5(
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; CHECK-NEXT: [[T0:%.*]] = lshr <2 x i64> [[X:%.*]], <i64 63, i64 undef>
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; CHECK-NEXT: [[T1:%.*]] = trunc <2 x i64> [[T0]] to <2 x i32>
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; CHECK-NEXT: [[R:%.*]] = sub <2 x i32> <i32 0, i32 undef>, [[T1]]
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; CHECK-NEXT: ret <2 x i32> [[R]]
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;
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%t0 = lshr <2 x i64> %x, <i64 63, i64 undef>
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%t1 = trunc <2 x i64> %t0 to <2 x i32>
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%r = sub <2 x i32> <i32 0, i32 undef>, %t1
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ret <2 x i32> %r
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}
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declare void @use64(i64)
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declare void @use32(i32)
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define i32 @t6(i64 %x) {
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; CHECK-LABEL: @t6(
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; CHECK-NEXT: [[T0_NEG:%.*]] = ashr i64 [[X:%.*]], 63
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; CHECK-NEXT: [[T0:%.*]] = lshr i64 [[X]], 63
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; CHECK-NEXT: call void @use64(i64 [[T0]])
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; CHECK-NEXT: [[T1_NEG:%.*]] = trunc i64 [[T0_NEG]] to i32
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; CHECK-NEXT: ret i32 [[T1_NEG]]
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;
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%t0 = lshr i64 %x, 63
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call void @use64(i64 %t0)
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%t1 = trunc i64 %t0 to i32
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%r = sub i32 0, %t1
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ret i32 %r
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}
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define i32 @n7(i64 %x) {
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; CHECK-LABEL: @n7(
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; CHECK-NEXT: [[T0:%.*]] = lshr i64 [[X:%.*]], 63
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; CHECK-NEXT: [[T1:%.*]] = trunc i64 [[T0]] to i32
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; CHECK-NEXT: call void @use32(i32 [[T1]])
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; CHECK-NEXT: [[R:%.*]] = sub nsw i32 0, [[T1]]
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; CHECK-NEXT: ret i32 [[R]]
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;
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%t0 = lshr i64 %x, 63
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%t1 = trunc i64 %t0 to i32
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call void @use32(i32 %t1)
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%r = sub i32 0, %t1
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ret i32 %r
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}
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define i32 @n8(i64 %x) {
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; CHECK-LABEL: @n8(
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; CHECK-NEXT: [[T0:%.*]] = lshr i64 [[X:%.*]], 63
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; CHECK-NEXT: call void @use64(i64 [[T0]])
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; CHECK-NEXT: [[T1:%.*]] = trunc i64 [[T0]] to i32
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; CHECK-NEXT: call void @use32(i32 [[T1]])
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; CHECK-NEXT: [[R:%.*]] = sub nsw i32 0, [[T1]]
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; CHECK-NEXT: ret i32 [[R]]
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;
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%t0 = lshr i64 %x, 63
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call void @use64(i64 %t0)
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%t1 = trunc i64 %t0 to i32
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call void @use32(i32 %t1)
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%r = sub i32 0, %t1
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ret i32 %r
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}
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define i32 @n9(i64 %x) {
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; CHECK-LABEL: @n9(
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; CHECK-NEXT: [[T0:%.*]] = lshr i64 [[X:%.*]], 62
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; CHECK-NEXT: [[T1:%.*]] = trunc i64 [[T0]] to i32
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; CHECK-NEXT: [[R:%.*]] = sub nsw i32 0, [[T1]]
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; CHECK-NEXT: ret i32 [[R]]
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;
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%t0 = lshr i64 %x, 62
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%t1 = trunc i64 %t0 to i32
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%r = sub i32 0, %t1
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ret i32 %r
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}
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define i32 @n10(i64 %x) {
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; CHECK-LABEL: @n10(
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; CHECK-NEXT: [[T0_NEG:%.*]] = ashr i64 [[X:%.*]], 63
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; CHECK-NEXT: [[T1_NEG:%.*]] = trunc i64 [[T0_NEG]] to i32
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; CHECK-NEXT: [[R:%.*]] = add i32 [[T1_NEG]], 1
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; CHECK-NEXT: ret i32 [[R]]
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;
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%t0 = lshr i64 %x, 63
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%t1 = trunc i64 %t0 to i32
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%r = sub i32 1, %t1
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ret i32 %r
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}
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