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fc43115972
"boolify" pointers, generating really awful code because getting the pointer value requires a load itself. Before: _foo: movb $1, _X.b ret _get: xorl %ecx, %ecx movb _X.b, %al testb %al, %al movl $_Y, %eax cmove %ecx, %eax ret With the xform disabled: _foo: movl $_Y, _X ret _get: movl _X, %eax ret llvm-svn: 66351
18 lines
546 B
LLVM
18 lines
546 B
LLVM
; RUN: llvm-as < %s | opt -globalopt | llvm-dis | grep {@X = internal global i32}
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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target triple = "i386-apple-darwin7"
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@X = internal global i32* null ; <i32**> [#uses=2]
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@Y = internal global i32 0 ; <i32*> [#uses=1]
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define void @foo() nounwind {
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entry:
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store i32* @Y, i32** @X, align 4
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ret void
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}
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define i32* @get() nounwind {
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entry:
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%0 = load i32** @X, align 4 ; <i32*> [#uses=1]
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ret i32* %0
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}
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