41 lines
1.1 KiB
LLVM
41 lines
1.1 KiB
LLVM
; A store or load cannot alias a global if the accessed amount is larger then
|
|
; the global.
|
|
|
|
; RUN: opt < %s -basicaa -gvn -S | FileCheck %s
|
|
target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
|
|
|
|
@B = global i16 8
|
|
|
|
; CHECK: @test1
|
|
define i16 @test1(i32* %P) {
|
|
%X = load i16* @B
|
|
store i32 7, i32* %P
|
|
%Y = load i16* @B
|
|
%Z = sub i16 %Y, %X
|
|
ret i16 %Z
|
|
; CHECK: ret i16 0
|
|
}
|
|
|
|
; Cannot know anything about the size of this global.
|
|
; rdar://8813415
|
|
@window = external global [0 x i8]
|
|
|
|
; CHECK: @test2
|
|
define i8 @test2(i32 %tmp79, i32 %w.2, i32 %indvar89) nounwind {
|
|
%tmp92 = add i32 %tmp79, %indvar89
|
|
%arrayidx412 = getelementptr [0 x i8]* @window, i32 0, i32 %tmp92
|
|
%tmp93 = add i32 %w.2, %indvar89
|
|
%arrayidx416 = getelementptr [0 x i8]* @window, i32 0, i32 %tmp93
|
|
|
|
%A = load i8* %arrayidx412, align 1
|
|
store i8 4, i8* %arrayidx416, align 1
|
|
|
|
%B = load i8* %arrayidx412, align 1
|
|
%C = sub i8 %A, %B
|
|
ret i8 %C
|
|
|
|
; CHECK: %B = load i8
|
|
; CHECK: ret i8 %C
|
|
}
|
|
|