e6bf48d110
As of revea222be0d, LLVMs assembler will actually try to honour the "fill value" part of p2align directives. X86 printed these as 0x90, which isn't actually what it wanted: we want multi-byte nops for .text padding. Compiling via a textual assembly file produces single-byte nop padding sinceea222be0dbut the built-in assembler will produce multi-byte nops. This divergent behaviour is undesirable. To fix: don't set the byte padding field for x86, which allows the assembler to pick multi-byte nops. Test that we get the same multi-byte padding when compiled via textual assembly or directly to object file. Added same-align-bytes-with-llasm-llobj.ll to that effect, updated numerous other tests to not contain check-lines for the explicit padding.
73 lines
2.2 KiB
LLVM
73 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i686-unknown-linux-gnu | FileCheck %s --check-prefix=X86
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; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s --check-prefix=X64
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define i32 @fn(i32 %a0, i32 %a1) {
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; X86-LABEL: fn:
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; X86: # %bb.0: # %entry
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; X86-NEXT: pushl %ebx
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; X86-NEXT: .cfi_def_cfa_offset 8
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; X86-NEXT: .cfi_offset %ebx, -8
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; X86-NEXT: xorl %eax, %eax
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; X86-NEXT: cmpl $1, {{[0-9]+}}(%esp)
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; X86-NEXT: sete %cl
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; X86-NEXT: setne %al
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; X86-NEXT: cmpl $1, {{[0-9]+}}(%esp)
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; X86-NEXT: sete %dl
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; X86-NEXT: negl %eax
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; X86-NEXT: addb %cl, %cl
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; X86-NEXT: movl %eax, %ebx
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; X86-NEXT: shll %cl, %ebx
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; X86-NEXT: addb %dl, %dl
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; X86-NEXT: movl %edx, %ecx
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; X86-NEXT: shll %cl, %eax
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; X86-NEXT: .p2align 4
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; X86-NEXT: .LBB0_1: # %bb1
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; X86-NEXT: # =>This Inner Loop Header: Depth=1
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; X86-NEXT: testl %ebx, %ebx
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; X86-NEXT: je .LBB0_1
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; X86-NEXT: # %bb.2: # %bb2
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; X86-NEXT: popl %ebx
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; X86-NEXT: .cfi_def_cfa_offset 4
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; X86-NEXT: retl
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;
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; X64-LABEL: fn:
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; X64: # %bb.0: # %entry
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; X64-NEXT: xorl %eax, %eax
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; X64-NEXT: cmpl $1, %edi
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; X64-NEXT: sete %cl
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; X64-NEXT: setne %al
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; X64-NEXT: cmpl $1, %esi
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; X64-NEXT: sete %dl
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; X64-NEXT: negl %eax
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; X64-NEXT: addb %cl, %cl
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; X64-NEXT: movl %eax, %esi
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; X64-NEXT: shll %cl, %esi
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; X64-NEXT: addb %dl, %dl
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; X64-NEXT: movl %edx, %ecx
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; X64-NEXT: shll %cl, %eax
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; X64-NEXT: .p2align 4
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; X64-NEXT: .LBB0_1: # %bb1
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; X64-NEXT: # =>This Inner Loop Header: Depth=1
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; X64-NEXT: testl %esi, %esi
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; X64-NEXT: je .LBB0_1
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; X64-NEXT: # %bb.2: # %bb2
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; X64-NEXT: retq
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entry:
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%cmp1 = icmp ne i32 %a0, 1
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%cmp2 = icmp eq i32 %a1, 1
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%sel1 = select i1 %cmp1, i32 0, i32 2
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%sel2 = select i1 %cmp2, i32 2, i32 0
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%sext = sext i1 %cmp1 to i32
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%shl1 = shl i32 %sext, %sel1
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%shl2 = shl i32 %sext, %sel2
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%tobool = icmp eq i32 %shl1, 0
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br label %bb1
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bb1: ; preds = %bb1, %entry
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br i1 %tobool, label %bb1, label %bb2
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bb2: ; preds = %bb1
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ret i32 %shl2
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}
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