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add1aa5259
DAGCombiner::ReduceLoadWidth was converting (trunc i32 (shl i64 v, 32)) into (shl i32 v, 32) into undef. To prevent this, check the shift count against the final result size. Patch by: Kevin Schoedel Reviewed by: Nadav Rotem llvm-svn: 174972
16 lines
331 B
LLVM
16 lines
331 B
LLVM
; RUN: llc < %s -march=x86 | FileCheck %s
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@temp1 = global i64 -77129852189294865, align 8
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define void @foo() nounwind {
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%x = load i64* @temp1, align 8
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%s = shl i64 %x, 32
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%t = trunc i64 %s to i32
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%z = zext i32 %t to i64
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store i64 %z, i64* @temp1, align 8
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; CHECK: movl $0, temp1+4
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; CHECK: movl $0, temp1
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ret void
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}
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