43c7dc52f1
PR47632 This allows MC to match `data32 ...` as one instruction instead of two (data32 without insn + insn). The compatibility with GNU as improves: `data32 ljmp` will be matched as ljmpl. `data32 lgdt 4(%eax)` will be matched as `lgdtl` (prefixes: 0x67 0x66, instead of 0x66 0x67). GNU as supports many other `data32 *w` as `*l`. We currently just hard code `data32 callw` and `data32 ljmpw`. Generalizing the suffix replacement is tricky and requires a think about the "bwlq" appending suffix rules in MatchAndEmitATTInstruction. Reviewed By: craig.topper Differential Revision: https://reviews.llvm.org/D88772
31 lines
1.2 KiB
ArmAsm
31 lines
1.2 KiB
ArmAsm
// RUN: not llvm-mc -triple x86_64-unknown-unknown --show-encoding %s 2> %t.err | FileCheck --check-prefix=64 %s
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// RUN: FileCheck --check-prefix=ERR64 < %t.err %s
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// RUN: not llvm-mc -triple i386-unknown-unknown --show-encoding %s 2> %t.err | FileCheck --check-prefix=32 %s
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// RUN: FileCheck --check-prefix=ERR32 < %t.err %s
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// RUN: not llvm-mc -triple i386-unknown-unknown-code16 --show-encoding %s 2> %t.err | FileCheck --check-prefix=16 %s
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// RUN: FileCheck --check-prefix=ERR16 < %t.err %s
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// ERR64: error: 'data32' is not supported in 64-bit mode
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// ERR32: error: redundant data32 prefix
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// 16: lgdtl 0
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// 16-SAME: encoding: [0x66,0x0f,0x01,0x16,0x00,0x00]
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data32 lgdt 0
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// 64: data16
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// 64: encoding: [0x66]
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// 64: lgdtq 0
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// 64: encoding: [0x0f,0x01,0x14,0x25,0x00,0x00,0x00,0x00]
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// 32: data16
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// 32: encoding: [0x66]
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// 32: lgdtl 0
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// 32: encoding: [0x0f,0x01,0x15,0x00,0x00,0x00,0x00]
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// ERR16: error: redundant data16 prefix
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data16 lgdt 0
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// 64: data16 # encoding: [0x66]
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// 64-NEXT: callq 0 # encoding: [0xe8,A,A,A,A]
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// 32: data16 # encoding: [0x66]
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// 32-NEXT: calll 0 # encoding: [0xe8,A,A,A,A]
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// ERR16: {{.*}}.s:[[#@LINE+1]]:1: error: redundant data16 prefix
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data16 call 0
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