d874c057bc
This introduced MMX instructions in code that wasn't previously using them, breaking programs using 64-bit vectors and x87 floating-point in the same application. See discussion on the code review for more details. > According to System V i386 ABI: the __m64 type paramater and return > value are passed by MMX registers. But current implementation treats > __m64 as i64 which results in parameter passing by stack and returning > by EDX and EAX. > > This patch fixes the bug (https://bugs.llvm.org/show_bug.cgi?id=41029) > for Linux and NetBSD. > > Patch by Wei Xiao (wxiao3) > > Differential Revision: https://reviews.llvm.org/D59744 llvm-svn: 363790
52 lines
2.4 KiB
C
52 lines
2.4 KiB
C
// RUN: %clang_cc1 -w -fblocks -triple i386-pc-linux-gnu -target-cpu pentium4 -emit-llvm -o %t %s
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// RUN: FileCheck < %t %s
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// CHECK-LABEL: define void @f56(
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// CHECK: i8 signext %a0, %struct.s56_0* byval(%struct.s56_0) align 4 %a1,
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// CHECK: i64 %a2.coerce, %struct.s56_1* byval(%struct.s56_1) align 4,
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// CHECK: <1 x double> %a4, %struct.s56_2* byval(%struct.s56_2) align 4,
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// CHECK: <4 x i32> %a6, %struct.s56_3* byval(%struct.s56_3) align 4,
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// CHECK: <2 x double> %a8, %struct.s56_4* byval(%struct.s56_4) align 4,
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// CHECK: <8 x i32> %a10, %struct.s56_5* byval(%struct.s56_5) align 4,
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// CHECK: <4 x double> %a12, %struct.s56_6* byval(%struct.s56_6) align 4)
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// CHECK: call void (i32, ...) @f56_0(i32 1,
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// CHECK: i32 %{{.*}}, %struct.s56_0* byval(%struct.s56_0) align 4 %{{[^ ]*}},
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// CHECK: i64 %{{[^ ]*}}, %struct.s56_1* byval(%struct.s56_1) align 4 %{{[^ ]*}},
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// CHECK: <1 x double> %{{[^ ]*}}, %struct.s56_2* byval(%struct.s56_2) align 4 %{{[^ ]*}},
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// CHECK: <4 x i32> %{{[^ ]*}}, %struct.s56_3* byval(%struct.s56_3) align 4 %{{[^ ]*}},
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// CHECK: <2 x double> %{{[^ ]*}}, %struct.s56_4* byval(%struct.s56_4) align 4 %{{[^ ]*}},
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// CHECK: <8 x i32> %{{[^ ]*}}, %struct.s56_5* byval(%struct.s56_5) align 4 %{{[^ ]*}},
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// CHECK: <4 x double> %{{[^ ]*}}, %struct.s56_6* byval(%struct.s56_6) 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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// when passed byval
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// <rdar://problem/8431367> clang misaligns parameters on stack
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typedef int __attribute__((vector_size (8))) t56_v2i;
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typedef double __attribute__((vector_size (8))) t56_v1d;
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typedef int __attribute__((vector_size (16))) t56_v4i;
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typedef double __attribute__((vector_size (16))) t56_v2d;
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typedef int __attribute__((vector_size (32))) t56_v8i;
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typedef double __attribute__((vector_size (32))) t56_v4d;
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struct s56_0 { char a; };
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struct s56_1 { t56_v2i a; };
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struct s56_2 { t56_v1d a; };
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struct s56_3 { t56_v4i a; };
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struct s56_4 { t56_v2d a; };
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struct s56_5 { t56_v8i a; };
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struct s56_6 { t56_v4d a; };
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void f56(char a0, struct s56_0 a1,
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t56_v2i a2, struct s56_1 a3,
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t56_v1d a4, struct s56_2 a5,
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t56_v4i a6, struct s56_3 a7,
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t56_v2d a8, struct s56_4 a9,
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t56_v8i a10, struct s56_5 a11,
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t56_v4d a12, struct s56_6 a13) {
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extern void f56_0(int x, ...);
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f56_0(1, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9,
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a10, a11, a12, a13);
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}
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