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.
118 lines
5.0 KiB
LLVM
118 lines
5.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i386-apple-darwin10.0 -mcpu=core2 -relocation-model=dynamic-no-pic | FileCheck -check-prefix=I386 %s
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; RUN: llc < %s -mtriple=x86_64-apple-darwin10.0 -mcpu=core2 -relocation-model=dynamic-no-pic | FileCheck -check-prefix=CORE2 %s
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; RUN: llc < %s -mtriple=x86_64-apple-darwin10.0 -mcpu=corei7 -relocation-model=dynamic-no-pic | FileCheck -check-prefix=COREI7 %s
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@.str1 = internal constant [31 x i8] c"DHRYSTONE PROGRAM, SOME STRING\00", align 8
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@.str3 = internal constant [31 x i8] c"DHRYSTONE PROGRAM, 2'ND STRING\00", align 8
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; This can be improved; see PR39952.
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define void @func() nounwind ssp {
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; I386-LABEL: func:
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; I386: ## %bb.0: ## %entry
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; I386-NEXT: subl $32, %esp
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; I386-NEXT: .p2align 4
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; I386-NEXT: LBB0_1: ## %bb
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; I386-NEXT: ## =>This Inner Loop Header: Depth=1
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; I386-NEXT: movl $4673097, {{[0-9]+}}(%esp) ## imm = 0x474E49
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; I386-NEXT: movl $1230132307, {{[0-9]+}}(%esp) ## imm = 0x49525453
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; I386-NEXT: movl $541347367, {{[0-9]+}}(%esp) ## imm = 0x20444E27
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; I386-NEXT: movl $840969293, {{[0-9]+}}(%esp) ## imm = 0x32202C4D
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; I386-NEXT: movl $1095911247, {{[0-9]+}}(%esp) ## imm = 0x4152474F
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; I386-NEXT: movl $1380982853, {{[0-9]+}}(%esp) ## imm = 0x52502045
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; I386-NEXT: movl $1313821779, {{[0-9]+}}(%esp) ## imm = 0x4E4F5453
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; I386-NEXT: movl $1498564676, (%esp) ## imm = 0x59524844
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; I386-NEXT: jmp LBB0_1
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;
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; CORE2-LABEL: func:
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; CORE2: ## %bb.0: ## %entry
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; CORE2-NEXT: movabsq $20070800167293728, %rax ## imm = 0x474E4952545320
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; CORE2-NEXT: movabsq $2325069237881678925, %rcx ## imm = 0x20444E2732202C4D
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; CORE2-NEXT: movabsq $4706902966564560965, %rdx ## imm = 0x4152474F52502045
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; CORE2-NEXT: movabsq $5642821575076104260, %rsi ## imm = 0x4E4F545359524844
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; CORE2-NEXT: .p2align 4
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; CORE2-NEXT: LBB0_1: ## %bb
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; CORE2-NEXT: ## =>This Inner Loop Header: Depth=1
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; CORE2-NEXT: movq %rax, -{{[0-9]+}}(%rsp)
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; CORE2-NEXT: movq %rcx, -{{[0-9]+}}(%rsp)
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; CORE2-NEXT: movq %rdx, -{{[0-9]+}}(%rsp)
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; CORE2-NEXT: movq %rsi, -{{[0-9]+}}(%rsp)
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; CORE2-NEXT: jmp LBB0_1
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;
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; COREI7-LABEL: func:
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; COREI7: ## %bb.0: ## %entry
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; COREI7-NEXT: movups _.str3+15(%rip), %xmm0
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; COREI7-NEXT: movups _.str3(%rip), %xmm1
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; COREI7-NEXT: .p2align 4
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; COREI7-NEXT: LBB0_1: ## %bb
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; COREI7-NEXT: ## =>This Inner Loop Header: Depth=1
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; COREI7-NEXT: movups %xmm0, -{{[0-9]+}}(%rsp)
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; COREI7-NEXT: movaps %xmm1, -{{[0-9]+}}(%rsp)
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; COREI7-NEXT: jmp LBB0_1
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entry:
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%String2Loc = alloca [31 x i8], align 1
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br label %bb
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bb: ; preds = %bb, %entry
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call void @llvm.memcpy.p0.p0.i64(ptr %String2Loc, ptr @.str3, i64 31, i1 false)
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br label %bb
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return: ; No predecessors!
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ret void
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}
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define void @func_aligned() nounwind ssp {
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; I386-LABEL: func_aligned:
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; I386: ## %bb.0: ## %entry
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; I386-NEXT: subl $44, %esp
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; I386-NEXT: movaps {{.*#+}} xmm0 = [1498564676,1313821779,1380982853,1095911247]
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; I386-NEXT: .p2align 4
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; I386-NEXT: LBB1_1: ## %bb
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; I386-NEXT: ## =>This Inner Loop Header: Depth=1
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; I386-NEXT: movaps %xmm0, (%esp)
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; I386-NEXT: movl $4673097, {{[0-9]+}}(%esp) ## imm = 0x474E49
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; I386-NEXT: movl $1230132307, {{[0-9]+}}(%esp) ## imm = 0x49525453
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; I386-NEXT: movl $541347367, {{[0-9]+}}(%esp) ## imm = 0x20444E27
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; I386-NEXT: movl $840969293, {{[0-9]+}}(%esp) ## imm = 0x32202C4D
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; I386-NEXT: jmp LBB1_1
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;
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; CORE2-LABEL: func_aligned:
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; CORE2: ## %bb.0: ## %entry
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; CORE2-NEXT: movabsq $20070800167293728, %rax ## imm = 0x474E4952545320
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; CORE2-NEXT: movabsq $2325069237881678925, %rcx ## imm = 0x20444E2732202C4D
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; CORE2-NEXT: movabsq $4706902966564560965, %rdx ## imm = 0x4152474F52502045
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; CORE2-NEXT: movabsq $5642821575076104260, %rsi ## imm = 0x4E4F545359524844
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; CORE2-NEXT: .p2align 4
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; CORE2-NEXT: LBB1_1: ## %bb
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; CORE2-NEXT: ## =>This Inner Loop Header: Depth=1
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; CORE2-NEXT: movq %rax, -{{[0-9]+}}(%rsp)
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; CORE2-NEXT: movq %rcx, -{{[0-9]+}}(%rsp)
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; CORE2-NEXT: movq %rdx, -{{[0-9]+}}(%rsp)
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; CORE2-NEXT: movq %rsi, -{{[0-9]+}}(%rsp)
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; CORE2-NEXT: jmp LBB1_1
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;
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; COREI7-LABEL: func_aligned:
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; COREI7: ## %bb.0: ## %entry
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; COREI7-NEXT: movups _.str3+15(%rip), %xmm0
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; COREI7-NEXT: movups _.str3(%rip), %xmm1
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; COREI7-NEXT: .p2align 4
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; COREI7-NEXT: LBB1_1: ## %bb
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; COREI7-NEXT: ## =>This Inner Loop Header: Depth=1
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; COREI7-NEXT: movups %xmm0, -{{[0-9]+}}(%rsp)
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; COREI7-NEXT: movaps %xmm1, -{{[0-9]+}}(%rsp)
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; COREI7-NEXT: jmp LBB1_1
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entry:
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%String2Loc = alloca [31 x i8], align 16
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br label %bb
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bb: ; preds = %bb, %entry
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call void @llvm.memcpy.p0.p0.i64(ptr %String2Loc, ptr @.str3, i64 31, i1 false)
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br label %bb
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return: ; No predecessors!
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ret void
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}
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declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind
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