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Fix CodeGenPrepare's address-mode sinking to handle unusual

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addresses, involving Base values which do not have Pointer type.
This fixes PR4297.

llvm-svn: 72739
This commit is contained in:
Dan Gohman 2009-06-02 21:29:13 +00:00
parent e54120ccae
commit f6e6588203
2 changed files with 28 additions and 1 deletions
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5
lib/Transforms/Scalar/CodeGenPrepare.cpp
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@ -624,8 +624,11 @@ bool CodeGenPrepare::OptimizeMemoryInst(Instruction *MemoryInst, Value *Addr,
// Add in the base register.
if (AddrMode.BaseReg) {
Value *V = AddrMode.BaseReg;
if (V->getType() != IntPtrTy)
if (isa<PointerType>(V->getType()))
V = new PtrToIntInst(V, IntPtrTy, "sunkaddr", InsertPt);
if (V->getType() != IntPtrTy)
V = CastInst::CreateIntegerCast(V, IntPtrTy, /*isSigned=*/true,
"sunkaddr", InsertPt);
if (Result)
Result = BinaryOperator::CreateAdd(Result, V, "sunkaddr", InsertPt);
else

24
test/CodeGen/X86/codegen-prepare-cast.ll Normal file
View File

@ -0,0 +1,24 @@
; RUN: llvm-as < %s | llc -march=x86-64
; PR4297
target datalayout =
"e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
target triple = "x86_64-unknown-linux-gnu"
%"byte[]" = type { i64, i8* }
%"char[][]" = type { i64, %"byte[]"* }
@.str = external constant [7 x i8] ; <[7 x i8]*> [#uses=1]
define fastcc i32 @_Dmain(%"char[][]" %unnamed) {
entry:
%tmp = getelementptr [7 x i8]* @.str, i32 0, i32 0 ; <i8*> [#uses=1]
br i1 undef, label %foreachbody, label %foreachend
foreachbody: ; preds = %entry
%tmp4 = getelementptr i8* %tmp, i32 undef ; <i8*> [#uses=1]
%tmp5 = load i8* %tmp4 ; <i8> [#uses=0]
unreachable
foreachend: ; preds = %entry
ret i32 0
}