1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
;RUN: opt -instcombine -S < %s | llc -mtriple=armv5e--linux-gnueabi | FileCheck %s
;RUN: opt -instcombine -S < %s | llc -mtriple=thumbv4t--linux-gnueabi | FileCheck %s
;RUN: opt -instcombine -S < %s | llc -mtriple=armv6--linux-gnueabi | FileCheck %s
;RUN: opt -instcombine -S < %s | llc -mtriple=armv7--linux-gnueabi | FileCheck %s --check-prefix=RBIT
;RUN: opt -instcombine -S < %s | llc -mtriple=thumbv8--linux-gnueabi | FileCheck %s --check-prefix=RBIT
;CHECK-NOT: rbit
;RBIT: rbit
define void @byte_reversal(i8* %p, i32 %n) {
entry:
br label %for.cond
for.cond: ; preds = %for.body, %entry
%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%cmp = icmp ult i32 %i.0, %n
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%0 = sext i32 %i.0 to i64
%arrayidx = getelementptr inbounds i8, i8* %p, i64 %0
%1 = load i8, i8* %arrayidx, align 1
%or19 = call i8 @llvm.bitreverse.i8(i8 %1)
store i8 %or19, i8* %arrayidx, align 1
%inc = add i32 %i.0, 1
br label %for.cond
for.end: ; preds = %for.cond
ret void
}
; Function Attrs: nounwind readnone
declare i8 @llvm.bitreverse.i8(i8)
|
