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This patch fixes https://llvm.org/bugs/show_bug.cgi?id=27703. If there is a sequence of one or more load instructions, each loaded value is used as address of later load instruction, bitcast is necessary to change the value type, don't optimize it. llvm-svn: 270135
21 lines
361 B
LLVM
21 lines
361 B
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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define void @mem() {
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bb:
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br label %bb6
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bb6:
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%.0 = phi i8** [ undef, %bb ], [ %t2, %bb6 ]
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%tmp = load i8*, i8** %.0, align 8
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%bc = bitcast i8* %tmp to i8**
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%t1 = load i8*, i8** %bc, align 8
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%t2 = bitcast i8* %t1 to i8**
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br label %bb6
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bb206:
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ret void
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; CHECK: phi
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; CHECK: bitcast
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; CHECK: load
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}
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