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35 lines
1.2 KiB
LLVM
35 lines
1.2 KiB
LLVM
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;RUN: opt -instcombine -S < %s | llc -mtriple=armv5e--linux-gnueabi | FileCheck %s
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;RUN: opt -instcombine -S < %s | llc -mtriple=thumbv4t--linux-gnueabi | FileCheck %s
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;RUN: opt -instcombine -S < %s | llc -mtriple=armv6--linux-gnueabi | FileCheck %s
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;RUN: opt -instcombine -S < %s | llc -mtriple=armv7--linux-gnueabi | FileCheck %s --check-prefix=RBIT
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;RUN: opt -instcombine -S < %s | llc -mtriple=thumbv8--linux-gnueabi | FileCheck %s --check-prefix=RBIT
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;CHECK-NOT: rbit
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;RBIT: rbit
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define void @byte_reversal(i8* %p, i32 %n) {
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entry:
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br label %for.cond
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for.cond: ; preds = %for.body, %entry
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%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%cmp = icmp ult i32 %i.0, %n
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br i1 %cmp, label %for.body, label %for.end
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for.body: ; preds = %for.cond
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%0 = sext i32 %i.0 to i64
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%arrayidx = getelementptr inbounds i8, i8* %p, i64 %0
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%1 = load i8, i8* %arrayidx, align 1
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%or19 = call i8 @llvm.bitreverse.i8(i8 %1)
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store i8 %or19, i8* %arrayidx, align 1
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%inc = add i32 %i.0, 1
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br label %for.cond
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for.end: ; preds = %for.cond
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ret void
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}
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; Function Attrs: nounwind readnone
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declare i8 @llvm.bitreverse.i8(i8)
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