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303b2333e4
__builtin_cpu_supports and __builtin_cpu_is use information in __cpu_model to decide cpu features. Before this change, __cpu_model was not declared as dso local. The generated code looks up the address in GOT when reading __cpu_model. This makes it impossible to use these functions in ifunc, because at that time GOT entries have not been relocated. This change makes it dso local. Differential Revision: https://reviews.llvm.org/D53850 llvm-svn: 349825
33 lines
1.0 KiB
C
33 lines
1.0 KiB
C
// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -emit-llvm < %s| FileCheck %s
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// Test that we have the structure definition, the gep offsets, the name of the
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// global, the bit grab, and the icmp correct.
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extern void a(const char *);
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// CHECK: @__cpu_model = external dso_local global { i32, i32, i32, [1 x i32] }
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// CHECK: @__cpu_features2 = external dso_local global i32
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int main() {
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__builtin_cpu_init();
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// CHECK: call void @__cpu_indicator_init
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if (__builtin_cpu_supports("sse4.2"))
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a("sse4.2");
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// CHECK: [[LOAD:%[^ ]+]] = load i32, i32* getelementptr inbounds ({ i32, i32, i32, [1 x i32] }, { i32, i32, i32, [1 x i32] }* @__cpu_model, i32 0, i32 3, i32 0)
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// CHECK: [[AND:%[^ ]+]] = and i32 [[LOAD]], 256
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// CHECK: = icmp eq i32 [[AND]], 256
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if (__builtin_cpu_supports("gfni"))
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a("gfni");
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// CHECK: [[LOAD:%[^ ]+]] = load i32, i32* @__cpu_features2
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// CHECK: [[AND:%[^ ]+]] = and i32 [[LOAD]], 1
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// CHECK: = icmp eq i32 [[AND]], 1
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return 0;
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}
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// CHECK: declare dso_local void @__cpu_indicator_init()
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