forked from OSchip/llvm-project
65 lines
2.4 KiB
LLVM
65 lines
2.4 KiB
LLVM
; RUN: opt < %s -basicaa -functionattrs -S | FileCheck %s
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%struct.X = type { i32*, i32* }
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declare i32 @g(i32*) readnone
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define i32 @f() {
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; CHECK: @f() readnone
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%x = alloca i32 ; <i32*> [#uses=2]
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store i32 0, i32* %x
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%y = call i32 @g(i32* %x) ; <i32> [#uses=1]
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ret i32 %y
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}
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define i32 @foo() nounwind {
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; CHECK: @foo() nounwind readonly
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entry:
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%y = alloca %struct.X ; <%struct.X*> [#uses=2]
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%x = alloca %struct.X ; <%struct.X*> [#uses=2]
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%j = alloca i32 ; <i32*> [#uses=2]
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%i = alloca i32 ; <i32*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store i32 0, i32* %i, align 4
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store i32 1, i32* %j, align 4
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%0 = getelementptr inbounds %struct.X* %y, i32 0, i32 0 ; <i32**> [#uses=1]
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store i32* %i, i32** %0, align 8
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%1 = getelementptr inbounds %struct.X* %x, i32 0, i32 1 ; <i32**> [#uses=1]
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store i32* %j, i32** %1, align 8
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%x1 = bitcast %struct.X* %x to i8* ; <i8*> [#uses=2]
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%y2 = bitcast %struct.X* %y to i8* ; <i8*> [#uses=1]
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call void @llvm.memcpy.i64(i8* %x1, i8* %y2, i64 8, i32 1)
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%2 = bitcast i8* %x1 to i32** ; <i32**> [#uses=1]
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%3 = load i32** %2, align 8 ; <i32*> [#uses=1]
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%4 = load i32* %3, align 4 ; <i32> [#uses=1]
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br label %return
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return: ; preds = %entry
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ret i32 %4
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}
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define i32 @t(i32 %a, i32 %b, i32 %c) nounwind {
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; CHECK: @t(i32 %a, i32 %b, i32 %c) nounwind readnone
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entry:
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%a.addr = alloca i32 ; <i32*> [#uses=3]
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%c.addr = alloca i32 ; <i32*> [#uses=2]
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store i32 %a, i32* %a.addr
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store i32 %c, i32* %c.addr
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%tmp = load i32* %a.addr ; <i32> [#uses=1]
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%tobool = icmp ne i32 %tmp, 0 ; <i1> [#uses=1]
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br i1 %tobool, label %if.then, label %if.else
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if.then: ; preds = %entry
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br label %if.end
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if.else: ; preds = %entry
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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%p.0 = phi i32* [ %a.addr, %if.then ], [ %c.addr, %if.else ] ; <i32*> [#uses=1]
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%tmp2 = load i32* %p.0 ; <i32> [#uses=1]
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ret i32 %tmp2
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}
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declare void @llvm.memcpy.i64(i8* nocapture, i8* nocapture, i64, i32) nounwind
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