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LLVM generates illegal `rbit r0, #352` instruction for rbit intrinsic. According to ARM ARM, rbit only takes register as argument, not immediate. The correct instruction should be rbit <Rd>, <Rm>. The bug was originally introduced in r211057. Differential Revision: http://reviews.llvm.org/D4980 llvm-svn: 216064
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; RUN: llc -mtriple=aarch64-eabi %s -o - | FileCheck %s | ||
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; CHECK-LABEL: rbit32 | ||
; CHECK: rbit w0, w0 | ||
define i32 @rbit32(i32 %t) { | ||
entry: | ||
%rbit.i = call i32 @llvm.aarch64.rbit.i32(i32 %t) | ||
ret i32 %rbit.i | ||
} | ||
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; CHECK-LABEL: rbit64 | ||
; CHECK: rbit x0, x0 | ||
define i64 @rbit64(i64 %t) { | ||
entry: | ||
%rbit.i = call i64 @llvm.aarch64.rbit.i64(i64 %t) | ||
ret i64 %rbit.i | ||
} | ||
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declare i64 @llvm.aarch64.rbit.i64(i64) | ||
declare i32 @llvm.aarch64.rbit.i32(i32) |
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; RUN: llc -mtriple=armv8-eabi %s -o - | FileCheck %s | ||
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; CHECK-LABEL: rbit | ||
; CHECK: rbit r0, r0 | ||
define i32 @rbit(i32 %t) { | ||
entry: | ||
%rbit = call i32 @llvm.arm.rbit(i32 %t) | ||
ret i32 %rbit | ||
} | ||
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; CHECK-LABEL: rbit_constant | ||
; CHECK: mov r0, #0 | ||
; CHECK: rbit r0, r0 | ||
define i32 @rbit_constant() { | ||
entry: | ||
%rbit.i = call i32 @llvm.arm.rbit(i32 0) | ||
ret i32 %rbit.i | ||
} | ||
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declare i32 @llvm.arm.rbit(i32) |