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https://github.com/c64scene-ar/llvm-6502.git
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f24ed77d24
This automagically provides a transform noticed by my super-optimizer as occurring quite often: "rem x, (select cond, x, 1)" -> 0. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130694 91177308-0d34-0410-b5e6-96231b3b80d8
18 lines
360 B
LLVM
18 lines
360 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: @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: @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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