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4757061c47
threading of shifts over selects and phis while there. This fires here and there in the testsuite, to not much effect. For example when compiling spirit it fires 5 times, during early-cse, resulting in 6 more cse simplifications, and 3 more terminators being folded by jump threading, but the final bitcode doesn't change in any interesting way: other optimizations would have caught the opportunity anyway, only later. llvm-svn: 123441
10 lines
202 B
LLVM
10 lines
202 B
LLVM
; RUN: opt < %s -instsimplify -S | FileCheck %s
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define i32 @shift_select(i1 %cond) {
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; CHECK: @shift_select
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%s = select i1 %cond, i32 0, i32 1
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%r = lshr i32 %s, 1
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ret i32 %r
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; CHECK: ret i32 0
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}
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