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22 lines
730 B
LLVM
22 lines
730 B
LLVM
; The loop sinker was running from the bottom of the loop to the top, causing
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; it to miss opportunities to sink instructions that depended on sinking other
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; instructions from the loop. Instead they got hoisted, which is better than
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; leaving them in the loop, but increases register pressure pointlessly.
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; RUN: llvm-as < %s | opt -licm | llvm-dis | \
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; RUN: %prcontext getelementptr 1 | grep Out:
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%Ty = type { i32, i32 }
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@X = external global %Ty ; <%Ty*> [#uses=1]
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define i32 @test() {
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br label %Loop
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Loop: ; preds = %Loop, %0
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%dead = getelementptr %Ty* @X, i64 0, i32 0 ; <i32*> [#uses=1]
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%sunk2 = load i32* %dead ; <i32> [#uses=1]
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br i1 false, label %Loop, label %Out
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Out: ; preds = %Loop
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ret i32 %sunk2
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}
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