80 lines
2.1 KiB
LLVM
80 lines
2.1 KiB
LLVM
; RUN: llc < %s -mtriple=armv7-apple-ios | FileCheck %s
|
|
;rdar://8003725
|
|
|
|
@G1 = external global i32
|
|
@G2 = external global i32
|
|
|
|
define i32 @f1(i32 %cond1, i32 %x1, i32 %x2, i32 %x3) {
|
|
entry:
|
|
; CHECK-LABEL: f1:
|
|
; CHECK: cmp
|
|
; CHECK: moveq
|
|
; CHECK-NOT: cmp
|
|
; CHECK: mov{{eq|ne}}
|
|
%tmp1 = icmp eq i32 %cond1, 0
|
|
%tmp2 = select i1 %tmp1, i32 %x1, i32 %x2
|
|
%tmp3 = select i1 %tmp1, i32 %x2, i32 %x3
|
|
%tmp4 = add i32 %tmp2, %tmp3
|
|
ret i32 %tmp4
|
|
}
|
|
|
|
@foo = external global i32
|
|
@bar = external global [250 x i8], align 1
|
|
|
|
; CSE of cmp across BB boundary
|
|
; rdar://10660865
|
|
define void @f2() nounwind ssp {
|
|
entry:
|
|
; CHECK-LABEL: f2:
|
|
; CHECK: cmp
|
|
; CHECK: bxlt
|
|
; CHECK-NOT: cmp
|
|
; CHECK: movle
|
|
%0 = load i32, i32* @foo, align 4
|
|
%cmp28 = icmp sgt i32 %0, 0
|
|
br i1 %cmp28, label %for.body.lr.ph, label %for.cond1.preheader
|
|
|
|
for.body.lr.ph: ; preds = %entry
|
|
%1 = icmp sgt i32 %0, 1
|
|
%smax = select i1 %1, i32 %0, i32 1
|
|
call void @llvm.memset.p0i8.i32(i8* getelementptr inbounds ([250 x i8], [250 x i8]* @bar, i32 0, i32 0), i8 0, i32 %smax, i32 1, i1 false)
|
|
unreachable
|
|
|
|
for.cond1.preheader: ; preds = %entry
|
|
ret void
|
|
}
|
|
|
|
declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind
|
|
|
|
; rdar://12462006
|
|
define i8* @f3(i8* %base, i32* nocapture %offset, i32 %size) nounwind {
|
|
entry:
|
|
; CHECK-LABEL: f3:
|
|
; CHECK-NOT: sub
|
|
; CHECK: cmp
|
|
; CHECK: blt
|
|
%0 = load i32, i32* %offset, align 4
|
|
%cmp = icmp slt i32 %0, %size
|
|
%s = sub nsw i32 %0, %size
|
|
%size2 = sub nsw i32 %size, 0
|
|
br i1 %cmp, label %return, label %if.end
|
|
|
|
if.end:
|
|
; We are checking cse between %sub here and %s in entry block.
|
|
%sub = sub nsw i32 %0, %size2
|
|
%s2 = sub nsw i32 %s, %size
|
|
%s3 = sub nsw i32 %sub, %s2
|
|
; CHECK: sub [[R1:r[0-9]+]], [[R2:r[0-9]+]], r2
|
|
; CHECK: sub [[R3:r[0-9]+]], [[R1]], r2
|
|
; CHECK: sub [[R4:r[0-9]+]], [[R1]], [[R3]]
|
|
; CHECK-NOT: sub
|
|
; CHECK: str
|
|
store i32 %s3, i32* %offset, align 4
|
|
%add.ptr = getelementptr inbounds i8, i8* %base, i32 %sub
|
|
br label %return
|
|
|
|
return:
|
|
%retval.0 = phi i8* [ %add.ptr, %if.end ], [ null, %entry ]
|
|
ret i8* %retval.0
|
|
}
|