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515 lines
16 KiB
515 lines
16 KiB
; RUN: opt -instcombine -S < %s | FileCheck %s
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%overflow.result = type {i8, i1}
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%ov.result.32 = type { i32, i1 }
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declare %overflow.result @llvm.uadd.with.overflow.i8(i8, i8) nounwind readnone
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declare %overflow.result @llvm.umul.with.overflow.i8(i8, i8) nounwind readnone
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declare %ov.result.32 @llvm.sadd.with.overflow.i32(i32, i32) nounwind readnone
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declare %ov.result.32 @llvm.uadd.with.overflow.i32(i32, i32) nounwind readnone
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declare %ov.result.32 @llvm.ssub.with.overflow.i32(i32, i32) nounwind readnone
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declare %ov.result.32 @llvm.usub.with.overflow.i32(i32, i32) nounwind readnone
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declare %ov.result.32 @llvm.smul.with.overflow.i32(i32, i32) nounwind readnone
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declare %ov.result.32 @llvm.umul.with.overflow.i32(i32, i32) nounwind readnone
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declare double @llvm.powi.f64(double, i32) nounwind readonly
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declare i32 @llvm.cttz.i32(i32, i1) nounwind readnone
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declare i32 @llvm.ctlz.i32(i32, i1) nounwind readnone
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declare i32 @llvm.ctpop.i32(i32) nounwind readnone
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declare i8 @llvm.ctlz.i8(i8, i1) nounwind readnone
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declare double @llvm.cos.f64(double %Val) nounwind readonly
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declare double @llvm.sin.f64(double %Val) nounwind readonly
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declare double @llvm.floor.f64(double %Val) nounwind readonly
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declare double @llvm.ceil.f64(double %Val) nounwind readonly
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declare double @llvm.trunc.f64(double %Val) nounwind readonly
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declare double @llvm.rint.f64(double %Val) nounwind readonly
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declare double @llvm.nearbyint.f64(double %Val) nounwind readonly
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define i8 @uaddtest1(i8 %A, i8 %B) {
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%x = call %overflow.result @llvm.uadd.with.overflow.i8(i8 %A, i8 %B)
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%y = extractvalue %overflow.result %x, 0
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ret i8 %y
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; CHECK-LABEL: @uaddtest1(
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; CHECK-NEXT: %y = add i8 %A, %B
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; CHECK-NEXT: ret i8 %y
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}
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define i8 @uaddtest2(i8 %A, i8 %B, i1* %overflowPtr) {
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%and.A = and i8 %A, 127
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%and.B = and i8 %B, 127
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%x = call %overflow.result @llvm.uadd.with.overflow.i8(i8 %and.A, i8 %and.B)
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%y = extractvalue %overflow.result %x, 0
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%z = extractvalue %overflow.result %x, 1
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store i1 %z, i1* %overflowPtr
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ret i8 %y
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; CHECK-LABEL: @uaddtest2(
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; CHECK-NEXT: %and.A = and i8 %A, 127
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; CHECK-NEXT: %and.B = and i8 %B, 127
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; CHECK-NEXT: %x = add nuw i8 %and.A, %and.B
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; CHECK-NEXT: store i1 false, i1* %overflowPtr
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; CHECK-NEXT: ret i8 %x
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}
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define i8 @uaddtest3(i8 %A, i8 %B, i1* %overflowPtr) {
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%or.A = or i8 %A, -128
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%or.B = or i8 %B, -128
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%x = call %overflow.result @llvm.uadd.with.overflow.i8(i8 %or.A, i8 %or.B)
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%y = extractvalue %overflow.result %x, 0
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%z = extractvalue %overflow.result %x, 1
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store i1 %z, i1* %overflowPtr
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ret i8 %y
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; CHECK-LABEL: @uaddtest3(
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; CHECK-NEXT: %or.A = or i8 %A, -128
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; CHECK-NEXT: %or.B = or i8 %B, -128
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; CHECK-NEXT: %x = add i8 %or.A, %or.B
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; CHECK-NEXT: store i1 true, i1* %overflowPtr
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; CHECK-NEXT: ret i8 %x
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}
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define i8 @uaddtest4(i8 %A, i1* %overflowPtr) {
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%x = call %overflow.result @llvm.uadd.with.overflow.i8(i8 undef, i8 %A)
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%y = extractvalue %overflow.result %x, 0
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%z = extractvalue %overflow.result %x, 1
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store i1 %z, i1* %overflowPtr
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ret i8 %y
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; CHECK-LABEL: @uaddtest4(
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; CHECK-NEXT: ret i8 undef
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}
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define i8 @uaddtest5(i8 %A, i1* %overflowPtr) {
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%x = call %overflow.result @llvm.uadd.with.overflow.i8(i8 0, i8 %A)
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%y = extractvalue %overflow.result %x, 0
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%z = extractvalue %overflow.result %x, 1
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store i1 %z, i1* %overflowPtr
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ret i8 %y
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; CHECK-LABEL: @uaddtest5(
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; CHECK: ret i8 %A
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}
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define i1 @uaddtest6(i8 %A, i8 %B) {
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%x = call %overflow.result @llvm.uadd.with.overflow.i8(i8 %A, i8 -4)
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%z = extractvalue %overflow.result %x, 1
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ret i1 %z
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; CHECK-LABEL: @uaddtest6(
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; CHECK-NEXT: %z = icmp ugt i8 %A, 3
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; CHECK-NEXT: ret i1 %z
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}
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define i8 @uaddtest7(i8 %A, i8 %B) {
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%x = call %overflow.result @llvm.uadd.with.overflow.i8(i8 %A, i8 %B)
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%z = extractvalue %overflow.result %x, 0
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ret i8 %z
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; CHECK-LABEL: @uaddtest7(
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; CHECK-NEXT: %z = add i8 %A, %B
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; CHECK-NEXT: ret i8 %z
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}
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; PR20194
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define %ov.result.32 @saddtest_nsw(i8 %a, i8 %b) {
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%A = sext i8 %a to i32
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%B = sext i8 %b to i32
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%x = call %ov.result.32 @llvm.sadd.with.overflow.i32(i32 %A, i32 %B)
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ret %ov.result.32 %x
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; CHECK-LABEL: @saddtest_nsw
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; CHECK: %x = add nsw i32 %A, %B
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; CHECK-NEXT: %1 = insertvalue %ov.result.32 { i32 undef, i1 false }, i32 %x, 0
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; CHECK-NEXT: ret %ov.result.32 %1
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}
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define %ov.result.32 @uaddtest_nuw(i32 %a, i32 %b) {
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%A = and i32 %a, 2147483647
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%B = and i32 %b, 2147483647
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%x = call %ov.result.32 @llvm.uadd.with.overflow.i32(i32 %A, i32 %B)
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ret %ov.result.32 %x
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; CHECK-LABEL: @uaddtest_nuw
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; CHECK: %x = add nuw i32 %A, %B
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; CHECK-NEXT: %1 = insertvalue %ov.result.32 { i32 undef, i1 false }, i32 %x, 0
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; CHECK-NEXT: ret %ov.result.32 %1
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}
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define %ov.result.32 @ssubtest_nsw(i8 %a, i8 %b) {
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%A = sext i8 %a to i32
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%B = sext i8 %b to i32
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%x = call %ov.result.32 @llvm.ssub.with.overflow.i32(i32 %A, i32 %B)
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ret %ov.result.32 %x
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; CHECK-LABEL: @ssubtest_nsw
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; CHECK: %x = sub nsw i32 %A, %B
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; CHECK-NEXT: %1 = insertvalue %ov.result.32 { i32 undef, i1 false }, i32 %x, 0
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; CHECK-NEXT: ret %ov.result.32 %1
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}
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define %ov.result.32 @usubtest_nuw(i32 %a, i32 %b) {
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%A = or i32 %a, 2147483648
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%B = and i32 %b, 2147483647
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%x = call %ov.result.32 @llvm.usub.with.overflow.i32(i32 %A, i32 %B)
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ret %ov.result.32 %x
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; CHECK-LABEL: @usubtest_nuw
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; CHECK: %x = sub nuw i32 %A, %B
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; CHECK-NEXT: %1 = insertvalue %ov.result.32 { i32 undef, i1 false }, i32 %x, 0
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; CHECK-NEXT: ret %ov.result.32 %1
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}
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define %ov.result.32 @smultest1_nsw(i32 %a, i32 %b) {
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%A = and i32 %a, 4095 ; 0xfff
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%B = and i32 %b, 524287; 0x7ffff
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%x = call %ov.result.32 @llvm.smul.with.overflow.i32(i32 %A, i32 %B)
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ret %ov.result.32 %x
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; CHECK-LABEL: @smultest1_nsw
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; CHECK: %x = mul nuw nsw i32 %A, %B
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; CHECK-NEXT: %1 = insertvalue %ov.result.32 { i32 undef, i1 false }, i32 %x, 0
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; CHECK-NEXT: ret %ov.result.32 %1
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}
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define %ov.result.32 @smultest2_nsw(i32 %a, i32 %b) {
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%A = ashr i32 %a, 16
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%B = ashr i32 %b, 16
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%x = call %ov.result.32 @llvm.smul.with.overflow.i32(i32 %A, i32 %B)
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ret %ov.result.32 %x
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; CHECK-LABEL: @smultest2_nsw
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; CHECK: %x = mul nsw i32 %A, %B
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; CHECK-NEXT: %1 = insertvalue %ov.result.32 { i32 undef, i1 false }, i32 %x, 0
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; CHECK-NEXT: ret %ov.result.32 %1
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}
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define %ov.result.32 @smultest3_sw(i32 %a, i32 %b) {
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%A = ashr i32 %a, 16
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%B = ashr i32 %b, 15
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%x = call %ov.result.32 @llvm.smul.with.overflow.i32(i32 %A, i32 %B)
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ret %ov.result.32 %x
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; CHECK-LABEL: @smultest3_sw
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; CHECK: %x = call %ov.result.32 @llvm.smul.with.overflow.i32(i32 %A, i32 %B)
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; CHECK-NEXT: ret %ov.result.32 %x
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}
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define %ov.result.32 @umultest_nuw(i32 %a, i32 %b) {
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%A = and i32 %a, 65535 ; 0xffff
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%B = and i32 %b, 65535 ; 0xffff
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%x = call %ov.result.32 @llvm.umul.with.overflow.i32(i32 %A, i32 %B)
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ret %ov.result.32 %x
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; CHECK-LABEL: @umultest_nuw
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; CHECK: %x = mul nuw i32 %A, %B
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; CHECK-NEXT: %1 = insertvalue %ov.result.32 { i32 undef, i1 false }, i32 %x, 0
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; CHECK-NEXT: ret %ov.result.32 %1
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}
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define i8 @umultest1(i8 %A, i1* %overflowPtr) {
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%x = call %overflow.result @llvm.umul.with.overflow.i8(i8 0, i8 %A)
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%y = extractvalue %overflow.result %x, 0
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%z = extractvalue %overflow.result %x, 1
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store i1 %z, i1* %overflowPtr
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ret i8 %y
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; CHECK-LABEL: @umultest1(
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; CHECK-NEXT: store i1 false, i1* %overflowPtr
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; CHECK-NEXT: ret i8 0
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}
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define i8 @umultest2(i8 %A, i1* %overflowPtr) {
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%x = call %overflow.result @llvm.umul.with.overflow.i8(i8 1, i8 %A)
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%y = extractvalue %overflow.result %x, 0
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%z = extractvalue %overflow.result %x, 1
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store i1 %z, i1* %overflowPtr
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ret i8 %y
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; CHECK-LABEL: @umultest2(
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; CHECK-NEXT: store i1 false, i1* %overflowPtr
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; CHECK-NEXT: ret i8 %A
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}
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define i32 @umultest3(i32 %n) nounwind {
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%shr = lshr i32 %n, 2
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%mul = call %ov.result.32 @llvm.umul.with.overflow.i32(i32 %shr, i32 3)
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%ov = extractvalue %ov.result.32 %mul, 1
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%res = extractvalue %ov.result.32 %mul, 0
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%ret = select i1 %ov, i32 -1, i32 %res
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ret i32 %ret
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; CHECK-LABEL: @umultest3(
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; CHECK-NEXT: shr
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; CHECK-NEXT: mul nuw
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; CHECK-NEXT: ret
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}
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define i32 @umultest4(i32 %n) nounwind {
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%shr = lshr i32 %n, 1
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%mul = call %ov.result.32 @llvm.umul.with.overflow.i32(i32 %shr, i32 4)
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%ov = extractvalue %ov.result.32 %mul, 1
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%res = extractvalue %ov.result.32 %mul, 0
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%ret = select i1 %ov, i32 -1, i32 %res
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ret i32 %ret
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; CHECK-LABEL: @umultest4(
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; CHECK: umul.with.overflow
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}
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define %ov.result.32 @umultest5(i32 %x, i32 %y) nounwind {
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%or_x = or i32 %x, 2147483648
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%or_y = or i32 %y, 2147483648
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%mul = call %ov.result.32 @llvm.umul.with.overflow.i32(i32 %or_x, i32 %or_y)
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ret %ov.result.32 %mul
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; CHECK-LABEL: @umultest5(
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; CHECK-NEXT: %[[or_x:.*]] = or i32 %x, -2147483648
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; CHECK-NEXT: %[[or_y:.*]] = or i32 %y, -2147483648
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; CHECK-NEXT: %[[mul:.*]] = mul i32 %[[or_x]], %[[or_y]]
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; CHECK-NEXT: %[[ret:.*]] = insertvalue %ov.result.32 { i32 undef, i1 true }, i32 %[[mul]], 0
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; CHECK-NEXT: ret %ov.result.32 %[[ret]]
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}
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define void @powi(double %V, double *%P) {
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entry:
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%A = tail call double @llvm.powi.f64(double %V, i32 -1) nounwind
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store volatile double %A, double* %P
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%B = tail call double @llvm.powi.f64(double %V, i32 0) nounwind
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store volatile double %B, double* %P
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%C = tail call double @llvm.powi.f64(double %V, i32 1) nounwind
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store volatile double %C, double* %P
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ret void
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; CHECK-LABEL: @powi(
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; CHECK: %A = fdiv double 1.0{{.*}}, %V
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; CHECK: store volatile double %A,
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; CHECK: store volatile double 1.0
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; CHECK: store volatile double %V
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}
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define i32 @cttz(i32 %a) {
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entry:
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%or = or i32 %a, 8
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%and = and i32 %or, -8
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%count = tail call i32 @llvm.cttz.i32(i32 %and, i1 true) nounwind readnone
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ret i32 %count
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; CHECK-LABEL: @cttz(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret i32 3
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}
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define i8 @ctlz(i8 %a) {
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entry:
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%or = or i8 %a, 32
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%and = and i8 %or, 63
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%count = tail call i8 @llvm.ctlz.i8(i8 %and, i1 true) nounwind readnone
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ret i8 %count
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; CHECK-LABEL: @ctlz(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: ret i8 2
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}
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define void @cmp.simplify(i32 %a, i32 %b, i1* %c) {
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entry:
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%lz = tail call i32 @llvm.ctlz.i32(i32 %a, i1 false) nounwind readnone
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%lz.cmp = icmp eq i32 %lz, 32
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store volatile i1 %lz.cmp, i1* %c
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%tz = tail call i32 @llvm.cttz.i32(i32 %a, i1 false) nounwind readnone
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%tz.cmp = icmp ne i32 %tz, 32
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store volatile i1 %tz.cmp, i1* %c
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%pop = tail call i32 @llvm.ctpop.i32(i32 %b) nounwind readnone
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%pop.cmp = icmp eq i32 %pop, 0
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store volatile i1 %pop.cmp, i1* %c
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ret void
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; CHECK: @cmp.simplify
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; CHECK-NEXT: entry:
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; CHECK-NEXT: %lz.cmp = icmp eq i32 %a, 0
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; CHECK-NEXT: store volatile i1 %lz.cmp, i1* %c
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; CHECK-NEXT: %tz.cmp = icmp ne i32 %a, 0
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; CHECK-NEXT: store volatile i1 %tz.cmp, i1* %c
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; CHECK-NEXT: %pop.cmp = icmp eq i32 %b, 0
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; CHECK-NEXT: store volatile i1 %pop.cmp, i1* %c
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}
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define i32 @cttz_simplify1a(i32 %x) nounwind readnone ssp {
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%tmp1 = tail call i32 @llvm.ctlz.i32(i32 %x, i1 false)
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%shr3 = lshr i32 %tmp1, 5
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ret i32 %shr3
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; CHECK-LABEL: @cttz_simplify1a(
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; CHECK: icmp eq i32 %x, 0
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; CHECK-NEXT: zext i1
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; CHECK-NEXT: ret i32
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}
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define i32 @cttz_simplify1b(i32 %x) nounwind readnone ssp {
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%tmp1 = tail call i32 @llvm.ctlz.i32(i32 %x, i1 true)
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%shr3 = lshr i32 %tmp1, 5
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ret i32 %shr3
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; CHECK-LABEL: @cttz_simplify1b(
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; CHECK-NEXT: ret i32 0
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}
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define i32 @ctlz_undef(i32 %Value) nounwind {
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%ctlz = call i32 @llvm.ctlz.i32(i32 0, i1 true)
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ret i32 %ctlz
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; CHECK-LABEL: @ctlz_undef(
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; CHECK-NEXT: ret i32 undef
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}
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define i32 @cttz_undef(i32 %Value) nounwind {
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%cttz = call i32 @llvm.cttz.i32(i32 0, i1 true)
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ret i32 %cttz
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; CHECK-LABEL: @cttz_undef(
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; CHECK-NEXT: ret i32 undef
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}
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define i32 @ctlz_select(i32 %Value) nounwind {
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%tobool = icmp ne i32 %Value, 0
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%ctlz = call i32 @llvm.ctlz.i32(i32 %Value, i1 true)
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%s = select i1 %tobool, i32 %ctlz, i32 32
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ret i32 %s
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; CHECK-LABEL: @ctlz_select(
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; CHECK-NEXT: call i32 @llvm.ctlz.i32(i32 %Value, i1 false)
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; CHECK-NEXT: ret i32
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}
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define i32 @cttz_select(i32 %Value) nounwind {
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%tobool = icmp ne i32 %Value, 0
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%cttz = call i32 @llvm.cttz.i32(i32 %Value, i1 true)
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%s = select i1 %tobool, i32 %cttz, i32 32
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ret i32 %s
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; CHECK-LABEL: @cttz_select(
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; CHECK-NEXT: call i32 @llvm.cttz.i32(i32 %Value, i1 false)
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; CHECK-NEXT: ret i32
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}
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; CHECK-LABEL: @overflow_div_add(
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; CHECK: ret i1 false
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define i1 @overflow_div_add(i32 %v1, i32 %v2) nounwind {
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entry:
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%div = sdiv i32 %v1, 2
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%t = call %ov.result.32 @llvm.sadd.with.overflow.i32(i32 %div, i32 1)
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%obit = extractvalue %ov.result.32 %t, 1
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ret i1 %obit
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}
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; CHECK-LABEL: @overflow_div_sub(
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; CHECK: ret i1 false
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define i1 @overflow_div_sub(i32 %v1, i32 %v2) nounwind {
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entry:
|
|
; Check cases where the known sign bits are larger than the word size.
|
|
%a = ashr i32 %v1, 18
|
|
%div = sdiv i32 %a, 65536
|
|
%t = call %ov.result.32 @llvm.ssub.with.overflow.i32(i32 %div, i32 1)
|
|
%obit = extractvalue %ov.result.32 %t, 1
|
|
ret i1 %obit
|
|
}
|
|
|
|
; CHECK-LABEL: @overflow_mod_mul(
|
|
; CHECK: ret i1 false
|
|
define i1 @overflow_mod_mul(i32 %v1, i32 %v2) nounwind {
|
|
entry:
|
|
%rem = srem i32 %v1, 1000
|
|
%t = call %ov.result.32 @llvm.smul.with.overflow.i32(i32 %rem, i32 %rem)
|
|
%obit = extractvalue %ov.result.32 %t, 1
|
|
ret i1 %obit
|
|
}
|
|
|
|
; CHECK-LABEL: @overflow_mod_overflow_mul(
|
|
; CHECK-NOT: ret i1 false
|
|
define i1 @overflow_mod_overflow_mul(i32 %v1, i32 %v2) nounwind {
|
|
entry:
|
|
%rem = srem i32 %v1, 65537
|
|
; This may overflow because the result of the mul operands may be greater than 16bits
|
|
; and the result greater than 32.
|
|
%t = call %ov.result.32 @llvm.smul.with.overflow.i32(i32 %rem, i32 %rem)
|
|
%obit = extractvalue %ov.result.32 %t, 1
|
|
ret i1 %obit
|
|
}
|
|
|
|
define %ov.result.32 @ssubtest_reorder(i8 %a) {
|
|
%A = sext i8 %a to i32
|
|
%x = call %ov.result.32 @llvm.ssub.with.overflow.i32(i32 0, i32 %A)
|
|
ret %ov.result.32 %x
|
|
; CHECK-LABEL: @ssubtest_reorder
|
|
; CHECK: %x = sub nsw i32 0, %A
|
|
; CHECK-NEXT: %1 = insertvalue %ov.result.32 { i32 undef, i1 false }, i32 %x, 0
|
|
; CHECK-NEXT: ret %ov.result.32 %1
|
|
}
|
|
|
|
define %ov.result.32 @never_overflows_ssub_test0(i32 %a) {
|
|
%x = call %ov.result.32 @llvm.ssub.with.overflow.i32(i32 %a, i32 0)
|
|
ret %ov.result.32 %x
|
|
; CHECK-LABEL: @never_overflows_ssub_test0
|
|
; CHECK-NEXT: %[[x:.*]] = insertvalue %ov.result.32 { i32 undef, i1 false }, i32 %a, 0
|
|
; CHECK-NEXT: ret %ov.result.32 %[[x]]
|
|
}
|
|
|
|
define void @cos(double *%P) {
|
|
entry:
|
|
%B = tail call double @llvm.cos.f64(double 0.0) nounwind
|
|
store volatile double %B, double* %P
|
|
|
|
ret void
|
|
; CHECK-LABEL: @cos(
|
|
; CHECK: store volatile double 1.000000e+00, double* %P
|
|
}
|
|
|
|
define void @sin(double *%P) {
|
|
entry:
|
|
%B = tail call double @llvm.sin.f64(double 0.0) nounwind
|
|
store volatile double %B, double* %P
|
|
|
|
ret void
|
|
; CHECK-LABEL: @sin(
|
|
; CHECK: store volatile double 0.000000e+00, double* %P
|
|
}
|
|
|
|
define void @floor(double *%P) {
|
|
entry:
|
|
%B = tail call double @llvm.floor.f64(double 1.5) nounwind
|
|
store volatile double %B, double* %P
|
|
%C = tail call double @llvm.floor.f64(double -1.5) nounwind
|
|
store volatile double %C, double* %P
|
|
ret void
|
|
; CHECK-LABEL: @floor(
|
|
; CHECK: store volatile double 1.000000e+00, double* %P, align 8
|
|
; CHECK: store volatile double -2.000000e+00, double* %P, align 8
|
|
}
|
|
|
|
define void @ceil(double *%P) {
|
|
entry:
|
|
%B = tail call double @llvm.ceil.f64(double 1.5) nounwind
|
|
store volatile double %B, double* %P
|
|
%C = tail call double @llvm.ceil.f64(double -1.5) nounwind
|
|
store volatile double %C, double* %P
|
|
ret void
|
|
; CHECK-LABEL: @ceil(
|
|
; CHECK: store volatile double 2.000000e+00, double* %P, align 8
|
|
; CHECK: store volatile double -1.000000e+00, double* %P, align 8
|
|
}
|
|
|
|
define void @trunc(double *%P) {
|
|
entry:
|
|
%B = tail call double @llvm.trunc.f64(double 1.5) nounwind
|
|
store volatile double %B, double* %P
|
|
%C = tail call double @llvm.trunc.f64(double -1.5) nounwind
|
|
store volatile double %C, double* %P
|
|
ret void
|
|
; CHECK-LABEL: @trunc(
|
|
; CHECK: store volatile double 1.000000e+00, double* %P, align 8
|
|
; CHECK: store volatile double -1.000000e+00, double* %P, align 8
|
|
}
|
|
|
|
define void @rint(double *%P) {
|
|
entry:
|
|
%B = tail call double @llvm.rint.f64(double 1.5) nounwind
|
|
store volatile double %B, double* %P
|
|
%C = tail call double @llvm.rint.f64(double -1.5) nounwind
|
|
store volatile double %C, double* %P
|
|
ret void
|
|
; CHECK-LABEL: @rint(
|
|
; CHECK: store volatile double 2.000000e+00, double* %P, align 8
|
|
; CHECK: store volatile double -2.000000e+00, double* %P, align 8
|
|
}
|
|
|
|
define void @nearbyint(double *%P) {
|
|
entry:
|
|
%B = tail call double @llvm.nearbyint.f64(double 1.5) nounwind
|
|
store volatile double %B, double* %P
|
|
%C = tail call double @llvm.nearbyint.f64(double -1.5) nounwind
|
|
store volatile double %C, double* %P
|
|
ret void
|
|
; CHECK-LABEL: @nearbyint(
|
|
; CHECK: store volatile double 2.000000e+00, double* %P, align 8
|
|
; CHECK: store volatile double -2.000000e+00, double* %P, align 8
|
|
}
|