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a087e6e82f
block. Other blocks may have pointer cycles that will crash basicaa and other alias analyses. In any case, there is no point wasting cycles optimizing dead blocks. This fixes rdar://7635088 llvm-svn: 95852
57 lines
2.0 KiB
LLVM
57 lines
2.0 KiB
LLVM
; RUN: opt < %s -dse -S
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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-darwin10.0"
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@g80 = external global i8 ; <i8*> [#uses=3]
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declare signext i8 @foo(i8 signext, i8 signext) nounwind readnone ssp
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declare i32 @func68(i32) nounwind readonly ssp
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; PR4815
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define void @test1(i32 %int32p54) noreturn nounwind ssp {
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entry:
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br label %bb
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bb: ; preds = %bb, %entry
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%storemerge = phi i8 [ %2, %bb ], [ 1, %entry ] ; <i8> [#uses=1]
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store i8 %storemerge, i8* @g80
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%0 = tail call i32 @func68(i32 1) nounwind ssp ; <i32> [#uses=1]
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%1 = trunc i32 %0 to i8 ; <i8> [#uses=1]
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store i8 %1, i8* @g80, align 1
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store i8 undef, i8* @g80, align 1
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%2 = tail call signext i8 @foo(i8 signext undef, i8 signext 1) nounwind ; <i8> [#uses=1]
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br label %bb
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}
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define fastcc i32 @test2() nounwind ssp {
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bb14: ; preds = %bb4
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%0 = bitcast i8* undef to i8** ; <i8**> [#uses=1]
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%1 = getelementptr inbounds i8** %0, i64 undef ; <i8**> [#uses=1]
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%2 = bitcast i8** %1 to i16* ; <i16*> [#uses=2]
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%3 = getelementptr inbounds i16* %2, i64 undef ; <i16*> [#uses=1]
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%4 = bitcast i16* %3 to i8* ; <i8*> [#uses=1]
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%5 = getelementptr inbounds i8* %4, i64 undef ; <i8*> [#uses=1]
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%6 = getelementptr inbounds i16* %2, i64 undef ; <i16*> [#uses=1]
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store i16 undef, i16* %6, align 2
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%7 = getelementptr inbounds i8* %5, i64 undef ; <i8*> [#uses=1]
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call void @llvm.memcpy.i64(i8* %7, i8* undef, i64 undef, i32 1) nounwind
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unreachable
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}
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declare void @llvm.memcpy.i64(i8* nocapture, i8* nocapture, i64, i32) nounwind
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; rdar://7635088
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define i32 @test3() {
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entry:
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ret i32 0
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dead:
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%P2 = getelementptr i32 *%P2, i32 52
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%Q2 = getelementptr i32 *%Q2, i32 52
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store i32 4, i32* %P2
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store i32 4, i32* %Q2
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br label %dead
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} |