223 lines
6.5 KiB
LLVM
223 lines
6.5 KiB
LLVM
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; RUN: opt %s -instcombine -S | FileCheck %s
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%overflow.result = type {i8, i1}
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declare %overflow.result @llvm.uadd.with.overflow.i8(i8, i8)
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declare %overflow.result @llvm.umul.with.overflow.i8(i8, i8)
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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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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: @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: @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: @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: @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: @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: @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: @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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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: @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: @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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%ov.result.32 = type { i32, i1 }
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declare %ov.result.32 @llvm.umul.with.overflow.i32(i32, i32) nounwind readnone
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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: @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: @umultest4
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; CHECK: umul.with.overflow
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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: @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: @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: @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: @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: @cttz_simplify1b
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; CHECK-NEXT: ret i32 0
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}
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