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c3e82bf9f5
call DAGCombiner. But we ran into a case (on Windows) where the calling convention causes argument lowering to bail out of fast-isel, and we end up in CodeGenAndEmitDAG() which does run DAGCombiner. So, we need to make DAGCombiner check for 'optnone' after all. Commit includes the test that found this, plus another one that got missed in the original optnone work. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221168 91177308-0d34-0410-b5e6-96231b3b80d8
36 lines
766 B
LLVM
36 lines
766 B
LLVM
; RUN: llc < %s -mcpu=corei7 -march=x86-64 -mattr=+sse2 | FileCheck %s
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; Verify that floating-point operations inside 'optnone' functions
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; are not optimized even if unsafe-fp-math is set.
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define float @foo(float %x) #0 {
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entry:
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%add = fadd fast float %x, %x
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%add1 = fadd fast float %add, %x
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ret float %add1
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}
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; CHECK-LABEL: @foo
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; CHECK-NOT: add
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; CHECK: mul
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; CHECK-NOT: add
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; CHECK: ret
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define float @fooWithOptnone(float %x) #1 {
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entry:
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%add = fadd fast float %x, %x
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%add1 = fadd fast float %add, %x
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ret float %add1
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}
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; CHECK-LABEL: @fooWithOptnone
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; CHECK-NOT: mul
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; CHECK: add
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; CHECK-NOT: mul
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; CHECK: add
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; CHECK-NOT: mul
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; CHECK: ret
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attributes #0 = { "unsafe-fp-math"="true" }
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attributes #1 = { noinline optnone "unsafe-fp-math"="true" }
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