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4a45626e2f
Summary: Use MemorySSA, if requested, to do less conservative memory dependency checking. This change doesn't enable the MemorySSA enhanced EarlyCSE in the default pipelines, so should be NFC. Reviewers: dberlin, sanjoy, reames, majnemer Subscribers: mcrosier, llvm-commits Differential Revision: http://reviews.llvm.org/D19821 llvm-svn: 280279
36 lines
903 B
LLVM
36 lines
903 B
LLVM
; RUN: opt -S -early-cse < %s | FileCheck %s
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; RUN: opt -S -basicaa -early-cse-memssa < %s | FileCheck %s
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target datalayout = "E-m:e-i64:64-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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; Function Attrs: nounwind
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define i64 @f(i64 %x) #0 {
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entry:
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%0 = call i64 @llvm.read_register.i64(metadata !0)
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call void bitcast (void (...)* @foo to void ()*)()
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%1 = call i64 @llvm.read_register.i64(metadata !0)
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%add = add nsw i64 %0, %1
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ret i64 %add
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}
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; CHECK-LABEL: @f
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; CHECK: call i64 @llvm.read_register.i64
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; CHECK: call i64 @llvm.read_register.i64
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; Function Attrs: nounwind readnone
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declare i64 @llvm.read_register.i64(metadata) #1
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; Function Attrs: nounwind
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declare void @llvm.write_register.i64(metadata, i64) #2
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declare void @foo(...)
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attributes #0 = { nounwind }
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attributes #1 = { nounwind readnone }
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attributes #2 = { nounwind }
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!llvm.named.register.r1 = !{!0}
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!0 = !{!"r1"}
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