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PR10077: fix fast-isel of extractvalue of aggregate constants. 

llvm-svn: 132676
This commit is contained in:
Eli Friedman 2011-06-06 05:46:34 +00:00
parent 7df6805d76
commit bd375f1a3f
2 changed files with 14 additions and 1 deletions
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4
llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
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@ -841,8 +841,10 @@ FastISel::SelectExtractValue(const User *U) {
DenseMap<const Value *, unsigned>::iterator I = FuncInfo.ValueMap.find(Op0);
if (I != FuncInfo.ValueMap.end())
ResultReg = I->second;
else
else if (isa<Instruction>(Op0))
ResultReg = FuncInfo.InitializeRegForValue(Op0);
else
return false; // fast-isel can't handle aggregate constants at the moment
// Get the actual result register, which is an offset from the base register.
unsigned VTIndex = ComputeLinearIndex(AggTy, EVI->idx_begin(), EVI->idx_end());

11
llvm/test/CodeGen/X86/fast-isel-agg-constant.ll Normal file
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@ -0,0 +1,11 @@
; RUN: llc < %s -march=x86-64 -O0 | FileCheck %s
; Make sure fast-isel doesn't screw up aggregate constants.
; (Failing out is okay, as long as we don't miscompile.)
%bar = type { i32 }
define i32 @foo() {
%tmp = extractvalue %bar { i32 3 }, 0
ret i32 %tmp
; CHECK: movl $3, %eax
}