forked from OSchip/llvm-project
43 lines
1.3 KiB
LLVM
43 lines
1.3 KiB
LLVM
; 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 < %s 2>&1 | FileCheck %s
|
|
;
|
|
; Things that BasicAA can prove points to constant memory should be
|
|
; liveOnEntry, as well.
|
|
|
|
declare void @clobberAllTheThings()
|
|
|
|
@str = private unnamed_addr constant [2 x i8] c"hi"
|
|
|
|
define i8 @foo() {
|
|
; CHECK: 1 = MemoryDef(liveOnEntry)
|
|
; CHECK-NEXT: call void @clobberAllTheThings()
|
|
call void @clobberAllTheThings()
|
|
%1 = getelementptr [2 x i8], [2 x i8]* @str, i64 0, i64 0
|
|
; CHECK: MemoryUse(liveOnEntry)
|
|
; CHECK-NEXT: %2 = load i8
|
|
%2 = load i8, i8* %1, align 1
|
|
%3 = getelementptr [2 x i8], [2 x i8]* @str, i64 0, i64 1
|
|
; CHECK: MemoryUse(liveOnEntry)
|
|
; CHECK-NEXT: %4 = load i8
|
|
%4 = load i8, i8* %3, align 1
|
|
%5 = add i8 %2, %4
|
|
ret i8 %5
|
|
}
|
|
|
|
define i8 @select(i1 %b) {
|
|
%1 = alloca i8, align 1
|
|
; CHECK: 1 = MemoryDef(liveOnEntry)
|
|
; CHECK-NEXT: store i8 0
|
|
store i8 0, i8* %1, align 1
|
|
|
|
; CHECK: 2 = MemoryDef(1)
|
|
; CHECK-NEXT: call void @clobberAllTheThings()
|
|
call void @clobberAllTheThings()
|
|
%2 = getelementptr [2 x i8], [2 x i8]* @str, i64 0, i64 0
|
|
%3 = select i1 %b, i8* %2, i8* %1
|
|
; CHECK: MemoryUse(2)
|
|
; CHECK-NEXT: %4 = load i8
|
|
%4 = load i8, i8* %3, align 1
|
|
ret i8 %4
|
|
}
|