| ;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) |