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d5f73530de
Let's consider the case where: %x i16 = 32768 %y i16 = 384 %x srem %y = 65408 (%x srem %y) urem %y = 128 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217939 91177308-0d34-0410-b5e6-96231b3b80d8
46 lines
1009 B
LLVM
46 lines
1009 B
LLVM
; RUN: opt < %s -instsimplify -S | FileCheck %s
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define i32 @select1(i32 %x, i1 %b) {
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; CHECK-LABEL: @select1(
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%rhs = select i1 %b, i32 %x, i32 1
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%rem = srem i32 %x, %rhs
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ret i32 %rem
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; CHECK: ret i32 0
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}
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define i32 @select2(i32 %x, i1 %b) {
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; CHECK-LABEL: @select2(
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%rhs = select i1 %b, i32 %x, i32 1
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%rem = urem i32 %x, %rhs
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ret i32 %rem
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; CHECK: ret i32 0
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}
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define i32 @rem1(i32 %x, i32 %n) {
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; CHECK-LABEL: @rem1(
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; CHECK-NEXT: %mod = srem i32 %x, %n
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; CHECK-NEXT: ret i32 %mod
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%mod = srem i32 %x, %n
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%mod1 = srem i32 %mod, %n
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ret i32 %mod1
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}
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define i32 @rem2(i32 %x, i32 %n) {
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; CHECK-LABEL: @rem2(
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; CHECK-NEXT: %mod = urem i32 %x, %n
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; CHECK-NEXT: ret i32 %mod
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%mod = urem i32 %x, %n
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%mod1 = urem i32 %mod, %n
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ret i32 %mod1
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}
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define i32 @rem3(i32 %x, i32 %n) {
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; CHECK-LABEL: @rem3(
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; CHECK-NEXT: %[[srem:.*]] = srem i32 %x, %n
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; CHECK-NEXT: %[[urem:.*]] = urem i32 %[[srem]], %n
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; CHECK-NEXT: ret i32 %[[urem]]
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%mod = srem i32 %x, %n
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%mod1 = urem i32 %mod, %n
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ret i32 %mod1
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}
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