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llvm-mirror/test/CodeGen/PowerPC/delete-node.ll
Dan Gohman aeaf83cfb8 Make ISel ignore dead nodes. The DAGCombiner normally eliminates
dead nodes, but in this case its missing one. Fixing the DAGCombiner
is desirable, but it's somewhat involved.

llvm-svn: 58777
2008-11-05 22:56:47 +00:00

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943 B
LLVM

; RUN: llvm-as < %s | llc -march=ppc32
; The DAGCombiner leaves behind a dead node in this testcase. Currently
; ISel is ignoring dead nodes, though it would be preferable for
; DAGCombiner to be able to eliminate the dead node.
define void @GrayATo32ARGBTabB(i8* %baseAddr, i16** %cmp, i32 %rowBytes) nounwind {
entry:
br label %bb1
bb1: ; preds = %bb1, %entry
%0 = load i16* null, align 2 ; <i16> [#uses=1]
%1 = ashr i16 %0, 4 ; <i16> [#uses=1]
%2 = sext i16 %1 to i32 ; <i32> [#uses=1]
%3 = getelementptr i8* null, i32 %2 ; <i8*> [#uses=1]
%4 = load i8* %3, align 1 ; <i8> [#uses=1]
%5 = zext i8 %4 to i32 ; <i32> [#uses=1]
%6 = shl i32 %5, 24 ; <i32> [#uses=1]
%7 = or i32 0, %6 ; <i32> [#uses=1]
store i32 %7, i32* null, align 4
br label %bb1
}