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Don't try to constant fold libm functions with non-finite arguments.

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Usually we wouldn't do this anyway because llvm_fenv_testexcept would return an
exception, but we have seen some cases where neither errno nor fenv detect an
exception on arm-linux.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114893 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2010-09-27 21:29:20 +00:00
parent 376ce97bac
commit 1f386c4ce1
2 changed files with 7 additions and 5 deletions
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5
test/Transforms/InstCombine/fold-calls.ll
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@@ -1,10 +1,5 @@
; RUN: opt -instcombine -S < %s | FileCheck %s
; This test is inexplicably still failing, which suggests a bug in the host
; libm. It appears that sin(inf) returns NaN without setting a floating point
; exception.
; XFAIL: arm-pc-linux-gnu
; This shouldn't fold, because sin(inf) is invalid.
; CHECK: @foo
; CHECK: %t = call double @sin(double 0x7FF0000000000000)