| Weiming Zhao | 4b3b13d | 2016-01-08 18:43:41 +0000 | [diff] [blame] | 1 | ;RUN: opt -instcombine -S < %s | llc -mtriple=armv5e--linux-gnueabi | FileCheck %s |
| 2 | ;RUN: opt -instcombine -S < %s | llc -mtriple=thumbv4t--linux-gnueabi | FileCheck %s |
| 3 | ;RUN: opt -instcombine -S < %s | llc -mtriple=armv6--linux-gnueabi | FileCheck %s |
| 4 | |
| 5 | ;RUN: opt -instcombine -S < %s | llc -mtriple=armv7--linux-gnueabi | FileCheck %s --check-prefix=RBIT |
| 6 | ;RUN: opt -instcombine -S < %s | llc -mtriple=thumbv8--linux-gnueabi | FileCheck %s --check-prefix=RBIT |
| 7 | |
| 8 | ;CHECK-NOT: rbit |
| 9 | ;RBIT: rbit |
| 10 | |
| 11 | define void @byte_reversal(i8* %p, i32 %n) { |
| 12 | entry: |
| 13 | br label %for.cond |
| 14 | |
| 15 | for.cond: ; preds = %for.body, %entry |
| 16 | %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ] |
| 17 | %cmp = icmp ult i32 %i.0, %n |
| 18 | br i1 %cmp, label %for.body, label %for.end |
| 19 | |
| 20 | for.body: ; preds = %for.cond |
| 21 | %0 = sext i32 %i.0 to i64 |
| 22 | %arrayidx = getelementptr inbounds i8, i8* %p, i64 %0 |
| 23 | %1 = load i8, i8* %arrayidx, align 1 |
| 24 | %or19 = call i8 @llvm.bitreverse.i8(i8 %1) |
| 25 | store i8 %or19, i8* %arrayidx, align 1 |
| 26 | %inc = add i32 %i.0, 1 |
| 27 | br label %for.cond |
| 28 | |
| 29 | for.end: ; preds = %for.cond |
| 30 | ret void |
| 31 | } |
| 32 | |
| 33 | ; Function Attrs: nounwind readnone |
| 34 | declare i8 @llvm.bitreverse.i8(i8) |