forked from OSchip/llvm-project
83 lines
2.3 KiB
LLVM
83 lines
2.3 KiB
LLVM
|
; RUN: llc -o - -mtriple=i386-unknown-linux-gnu < %s | FileCheck %s
|
||
|
|
; RUN: llc -o - -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s
|
||
|
|
|
||
|
|
@a = common global i32 0, align 4
|
||
|
|
@b = common global i32 0, align 4
|
||
|
|
@c = common global i32 0, align 4
|
||
|
|
@e = common global i32 0, align 4
|
||
|
|
@x = common global i32 0, align 4
|
||
|
|
@f = common global i32 0, align 4
|
||
|
|
@h = common global i32 0, align 4
|
||
|
|
@i = common global i32 0, align 4
|
||
|
|
|
||
|
|
; Test -Os to make sure immediates with multiple users don't get pulled in to
|
||
|
|
; instructions.
|
||
|
|
define i32 @foo() optsize {
|
||
|
|
; CHECK-LABEL: foo:
|
||
|
|
; CHECK: movl $1234, [[R1:%[a-z]+]]
|
||
|
|
; CHECK-NOT: movl $1234, a
|
||
|
|
; CHECK-NOT: movl $1234, b
|
||
|
|
; CHECK-NOT: movl $12, c
|
||
|
|
; CHECK-NOT: cmpl $12, e
|
||
|
|
; CHECK: movl [[R1]], a
|
||
|
|
; CHECK: movl [[R1]], b
|
||
|
|
|
||
|
|
entry:
|
||
|
|
store i32 1234, i32* @a
|
||
|
|
store i32 1234, i32* @b
|
||
|
|
store i32 12, i32* @c
|
||
|
|
%0 = load i32, i32* @e
|
||
|
|
%cmp = icmp eq i32 %0, 12
|
||
|
|
br i1 %cmp, label %if.then, label %if.end
|
||
|
|
|
||
|
|
if.then: ; preds = %entry
|
||
|
|
store i32 1, i32* @x
|
||
|
|
br label %if.end
|
||
|
|
|
||
|
|
; New block.. Make sure 1234 isn't live across basic blocks from before.
|
||
|
|
; CHECK: movl $1234, f
|
||
|
|
; CHECK: movl $555, [[R3:%[a-z]+]]
|
||
|
|
; CHECK-NOT: movl $555, h
|
||
|
|
; CHECK-NOT: addl $555, i
|
||
|
|
; CHECK: movl [[R3]], h
|
||
|
|
; CHECK: addl [[R3]], i
|
||
|
|
|
||
|
|
if.end: ; preds = %if.then, %entry
|
||
|
|
store i32 1234, i32* @f
|
||
|
|
store i32 555, i32* @h
|
||
|
|
%1 = load i32, i32* @i
|
||
|
|
%add1 = add nsw i32 %1, 555
|
||
|
|
store i32 %add1, i32* @i
|
||
|
|
ret i32 0
|
||
|
|
}
|
||
|
|
|
||
|
|
; Test -O2 to make sure that all immediates get pulled in to their users.
|
||
|
|
define i32 @foo2() {
|
||
|
|
; CHECK-LABEL: foo2:
|
||
|
|
; CHECK: movl $1234, a
|
||
|
|
; CHECK: movl $1234, b
|
||
|
|
|
||
|
|
entry:
|
||
|
|
store i32 1234, i32* @a
|
||
|
|
store i32 1234, i32* @b
|
||
|
|
|
||
|
|
ret i32 0
|
||
|
|
}
|
||
|
|
|
||
|
|
declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) #1
|
||
|
|
|
||
|
|
@AA = common global [100 x i8] zeroinitializer, align 1
|
||
|
|
|
||
|
|
; memset gets lowered in DAG. Constant merging should hoist all the
|
||
|
|
; immediates used to store to the individual memory locations. Make
|
||
|
|
; sure we don't directly store the immediates.
|
||
|
|
define void @foomemset() optsize {
|
||
|
|
; CHECK-LABEL: foomemset:
|
||
|
|
; CHECK-NOT: movl ${{.*}}, AA
|
||
|
|
; CHECK: mov{{l|q}} %{{e|r}}ax, AA
|
||
|
|
|
||
|
|
entry:
|
||
|
|
call void @llvm.memset.p0i8.i32(i8* getelementptr inbounds ([100 x i8], [100 x i8]* @AA, i32 0, i32 0), i8 33, i32 24, i32 1, i1 false)
|
||
|
|
ret void
|
||
|
|
}
|