pr28880.ll
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; RUN: opt -basic-aa -print-memoryssa -verify-memoryssa -enable-new-pm=0 -analyze < %s 2>&1 | FileCheck %s
; RUN: opt -aa-pipeline=basic-aa -passes='print<memoryssa>,verify<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s
; This testcase is reduced from SingleSource/Benchmarks/Misc/fbench.c
; It is testing to make sure that the MemorySSA use optimizer
; comes up with right answers when dealing with multiple MemoryLocations
; over different blocks. See PR28880 for more details.
@global = external hidden unnamed_addr global double, align 8
@global.1 = external hidden unnamed_addr global double, align 8
; Function Attrs: nounwind ssp uwtable
define hidden fastcc void @hoge() unnamed_addr #0 {
bb:
br i1 undef, label %bb1, label %bb2
bb1: ; preds = %bb
; These accesses should not conflict.
; CHECK: 1 = MemoryDef(liveOnEntry)
; 1 = MemoryDef(liveOnEntry)
; CHECK-NEXT: store double undef, double* @global, align 8
store double undef, double* @global, align 8
; CHECK: MemoryUse(liveOnEntry)
; MemoryUse(liveOnEntry)
; CHECK-NEXT: %tmp = load double, double* @global.1, align 8
%tmp = load double, double* @global.1, align 8
unreachable
bb2: ; preds = %bb
br label %bb3
bb3: ; preds = %bb2
br i1 undef, label %bb4, label %bb6
bb4: ; preds = %bb3
; These accesses should conflict.
; CHECK: 2 = MemoryDef(liveOnEntry)
; 2 = MemoryDef(liveOnEntry)
; CHECK-NEXT: store double 0.000000e+00, double* @global.1, align 8
store double 0.000000e+00, double* @global.1, align 8
; CHECK: MemoryUse(2)
; MemoryUse(2)
; CHECK-NEXT: %tmp5 = load double, double* @global.1, align 8
%tmp5 = load double, double* @global.1, align 8
unreachable
bb6: ; preds = %bb3
unreachable
}
attributes #0 = { nounwind ssp uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="core2" "target-features"="+cx16,+fxsr,+mmx,+sse,+sse2,+sse3,+ssse3" "unsafe-fp-math"="false" "use-soft-float"="false" }