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Handle IMPLICIT_DEF instructions in X86FloatingPoint.

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This fixes PR10575.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136787 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-08-03 16:33:19 +00:00
parent e3fbe6c0fb
commit 56e3232d5a
2 changed files with 33 additions and 1 deletions
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21
test/CodeGen/X86/fp-stack-O0-crash.ll
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@@ -1,4 +1,4 @@
; RUN: llc %s -O0 -fast-isel -regalloc=fast -o -
; RUN: llc %s -O0 -fast-isel -regalloc=fast -mcpu=i386 -o -
; PR4767
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
@@ -28,3 +28,22 @@ if.then: ; preds = %cond.false, %cond.t
if.end: ; preds = %if.then, %cond.false, %cond.true
ret void
}
; PR10575
; This produces a FP0 = IMPLICIT_DEF instruction.
define void @__m_rankmerge_MOD_dindexmerge_() nounwind {
entry:
br label %"20"
"20": ; preds = %"23", %entry
%0 = phi double [ undef, %entry ], [ %0, %"23" ]
%1 = phi double [ 0.000000e+00, %entry ], [ %2, %"23" ]
br i1 undef, label %"21", label %"23"
"21": ; preds = %"20"
ret void
"23": ; preds = %"20"
%2 = select i1 undef, double %0, double %1
br label %"20"
}