1469d82e1c
As defined in LangRef, branching on `undef` is undefined behavior. This PR aims to remove undefined behavior from tests. As UB tests break Alive2 and may be the root cause of breaking future optimizations. Here's an Alive2 proof for one of the examples: https://alive2.llvm.org/ce/z/TncxhP
27 lines
786 B
LLVM
27 lines
786 B
LLVM
; RUN: opt -passes=loop-rotate %s -S | FileCheck %s
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; REQUIRES: asserts
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; Check that loop rotate keeps proper mapping between cloned instructions,
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; otherwise, MemorySSA will assert.
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; CHECK-LABEL: @f
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define void @f(i1 %arg) {
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entry:
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br label %for.body16
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for.cond.cleanup15: ; preds = %for.body16
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ret void
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for.body16: ; preds = %for.body16.for.body16_crit_edge, %entry
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%call.i = tail call float @expf(float 0.000000e+00) #1
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%0 = load ptr, ptr undef, align 8
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br i1 %arg, label %for.cond.cleanup15, label %for.body16.for.body16_crit_edge
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for.body16.for.body16_crit_edge: ; preds = %for.body16
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%.pre = load float, ptr undef, align 8
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br label %for.body16
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}
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declare float @expf(float)
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