1b1c8d83d3
Turning on `enable_noundef_analysis` flag allows better codegen by removing freeze instructions. I modified clang by renaming `enable_noundef_analysis` flag to `disable-noundef-analysis` and turning it off by default. Test updates are made as a separate patch: D108453 Reviewed By: eugenis Differential Revision: https://reviews.llvm.org/D105169
39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin10.0.0 -emit-llvm -o - %s -std=c++11 -debug-info-kind=limited | FileCheck %s
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void crash() {
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volatile char *ptr = 0;
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char x = *ptr;
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}
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int test() {
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crash();
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return 1;
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}
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static int i = test();
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__attribute__((nodebug)) static int j = test();
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static int k = test();
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int main(void) {}
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// CHECK-LABEL: define internal void @__cxx_global_var_init()
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// CHECK-NOT: __cxx_global_var_init
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// CHECK: %[[C0:.+]] = call noundef i32 @_Z4testv(), !dbg ![[LINE:.*]]
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// CHECK-NOT: __cxx_global_var_init
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// CHECK: store i32 %[[C0]], i32* @_ZL1i, align 4, !dbg
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//
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// CHECK-LABEL: define internal void @__cxx_global_var_init.1()
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// CHECK-NOT: dbg
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// CHECK: %[[C1:.+]] = call noundef i32 @_Z4testv()
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// CHECK-NOT: dbg
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// CHECK: store i32 %[[C1]], i32* @_ZL1j, align 4
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//
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// CHECK-LABEL: define internal void @__cxx_global_var_init.2()
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// CHECK-NOT: __cxx_global_var_init
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// CHECK: %[[C2:.+]] = call noundef i32 @_Z4testv(), !dbg ![[LINE2:.*]]
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// CHECK-NOT: __cxx_global_var_init
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// CHECK: store i32 %[[C2]], i32* @_ZL1k, align 4, !dbg
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//
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// CHECK: ![[LINE]] = !DILocation(line: 13,
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// CHECK: ![[LINE2]] = !DILocation(line: 15,
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