mirror of
https://github.com/RPCSX/llvm.git
synced 2024-11-24 20:29:53 +00:00
d90d6130ff
If a function is known to return one of its arguments, we can use that in order to compute known bits of the return value. Differential Revision: http://reviews.llvm.org/D9397 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@275036 91177308-0d34-0410-b5e6-96231b3b80d8
29 lines
618 B
LLVM
29 lines
618 B
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
; Function Attrs: nounwind uwtable
|
|
define i32 @foo1(i32* align 32 %a) #0 {
|
|
entry:
|
|
%0 = load i32, i32* %a, align 4
|
|
ret i32 %0
|
|
|
|
; CHECK-LABEL: @foo1
|
|
; CHECK-DAG: load i32, i32* %a, align 32
|
|
; CHECK: ret i32
|
|
}
|
|
|
|
define i32 @foo2(i32* align 32 %a) #0 {
|
|
entry:
|
|
%v = call i32* @func1(i32* %a)
|
|
%0 = load i32, i32* %v, align 4
|
|
ret i32 %0
|
|
|
|
; CHECK-LABEL: @foo2
|
|
; CHECK-DAG: load i32, i32* %v, align 32
|
|
; CHECK: ret i32
|
|
}
|
|
|
|
declare i32* @func1(i32* returned) nounwind
|
|
|