Revert "[X86] Fix i386 struct and union parameter alignment"
This reverts commit d61cb749f4
(SVN:
361934).
According to James suggestion, revert this change. Please ref:
https://reviews.llvm.org/D60748
llvm-svn: 362186
This commit is contained in:
parent
2ab7af29c6
commit
48387ec187
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@ -1010,7 +1010,6 @@ class X86_32ABIInfo : public SwiftABIInfo {
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bool IsWin32StructABI;
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bool IsSoftFloatABI;
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bool IsMCUABI;
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bool IsLinuxABI;
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unsigned DefaultNumRegisterParameters;
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static bool isRegisterSize(unsigned Size) {
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@ -1077,7 +1076,6 @@ public:
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IsWin32StructABI(Win32StructABI),
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IsSoftFloatABI(SoftFloatABI),
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IsMCUABI(CGT.getTarget().getTriple().isOSIAMCU()),
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IsLinuxABI(CGT.getTarget().getTriple().isOSLinux()),
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DefaultNumRegisterParameters(NumRegisterParameters) {}
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bool shouldPassIndirectlyForSwift(ArrayRef<llvm::Type*> scalars,
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@ -1494,15 +1492,8 @@ unsigned X86_32ABIInfo::getTypeStackAlignInBytes(QualType Ty,
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if (Align <= MinABIStackAlignInBytes)
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return 0; // Use default alignment.
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if (IsLinuxABI) {
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// i386 System V ABI 2.1: Structures and unions assume the alignment of their
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// most strictly aligned component.
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//
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// Exclude other System V OS (e.g Darwin, PS4 and FreeBSD) since we don't
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// want to spend any effort dealing with the ramifications of ABI breaks.
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return Align;
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} else if (!IsDarwinVectorABI) {
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// On non-Darwin and non-Linux, the stack type alignment is always 4.
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// On non-Darwin, the stack type alignment is always 4.
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if (!IsDarwinVectorABI) {
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// Set explicit alignment, since we may need to realign the top.
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return MinABIStackAlignInBytes;
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}
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@ -1,25 +0,0 @@
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// RUN: %clang_cc1 -w -fblocks -ffreestanding -triple i386-pc-linux-gnu -emit-llvm -o %t %s
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// RUN: FileCheck < %t %s
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#include <immintrin.h>
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typedef union {
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int d[4];
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__m128 m;
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} M128;
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extern void foo(int, ...);
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M128 a;
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// CHECK-LABEL: define void @test
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// CHECK: entry:
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// CHECK: call void (i32, ...) @foo(i32 1, %union.M128* byval align 16
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// CHECK: call void (i32, ...) @foo(i32 1, <4 x float>
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void test(void)
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{
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foo(1, a);
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foo(1, a.m);
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}
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@ -3,21 +3,21 @@
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// CHECK-LABEL: define void @f56(
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// CHECK: i8 signext %a0, %struct.s56_0* byval align 4 %a1,
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// CHECK: i64 %a2.coerce, %struct.s56_1* byval align 8 %a3,
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// CHECK: <1 x double> %a4, %struct.s56_2* byval align 8 %a5,
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// CHECK: <4 x i32> %a6, %struct.s56_3* byval align 16 %a7,
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// CHECK: <2 x double> %a8, %struct.s56_4* byval align 16 %a9,
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// CHECK: <8 x i32> %a10, %struct.s56_5* byval align 32 %a11,
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// CHECK: <4 x double> %a12, %struct.s56_6* byval align 32 %a13)
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// CHECK: i64 %a2.coerce, %struct.s56_1* byval align 4,
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// CHECK: <1 x double> %a4, %struct.s56_2* byval align 4,
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// CHECK: <4 x i32> %a6, %struct.s56_3* byval align 4,
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// CHECK: <2 x double> %a8, %struct.s56_4* byval align 4,
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// CHECK: <8 x i32> %a10, %struct.s56_5* byval align 4,
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// CHECK: <4 x double> %a12, %struct.s56_6* byval align 4)
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// CHECK: call void (i32, ...) @f56_0(i32 1,
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// CHECK: i32 %{{.*}}, %struct.s56_0* byval align 4 %{{[^ ]*}},
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// CHECK: i64 %{{[^ ]*}}, %struct.s56_1* byval align 8 %{{[^ ]*}},
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// CHECK: <1 x double> %{{[^ ]*}}, %struct.s56_2* byval align 8 %{{[^ ]*}},
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// CHECK: <4 x i32> %{{[^ ]*}}, %struct.s56_3* byval align 16 %{{[^ ]*}},
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// CHECK: <2 x double> %{{[^ ]*}}, %struct.s56_4* byval align 16 %{{[^ ]*}},
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// CHECK: <8 x i32> %{{[^ ]*}}, %struct.s56_5* byval align 32 %{{[^ ]*}},
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// CHECK: <4 x double> %{{[^ ]*}}, %struct.s56_6* byval align 32 %{{[^ ]*}})
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// CHECK: i64 %{{[^ ]*}}, %struct.s56_1* byval align 4 %{{[^ ]*}},
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// CHECK: <1 x double> %{{[^ ]*}}, %struct.s56_2* byval align 4 %{{[^ ]*}},
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// CHECK: <4 x i32> %{{[^ ]*}}, %struct.s56_3* byval align 4 %{{[^ ]*}},
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// CHECK: <2 x double> %{{[^ ]*}}, %struct.s56_4* byval align 4 %{{[^ ]*}},
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// CHECK: <8 x i32> %{{[^ ]*}}, %struct.s56_5* byval align 4 %{{[^ ]*}},
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// CHECK: <4 x double> %{{[^ ]*}}, %struct.s56_6* byval align 4 %{{[^ ]*}})
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// CHECK: }
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//
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// <rdar://problem/7964854> [i386] clang misaligns long double in structures
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