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
17 lines
590 B
C
17 lines
590 B
C
// RUN: %clang_cc1 %s -emit-llvm -o - -fms-extensions -triple i686-pc-win32 | FileCheck %s
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// CHECK-LABEL: define dso_local void @test_alloca(
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void capture(void *);
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void test_alloca(int n) {
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capture(_alloca(n));
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// CHECK: %[[arg:.*]] = alloca i8, i32 %{{.*}}, align 16
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// CHECK: call void @capture(i8* noundef %[[arg]])
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}
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// CHECK-LABEL: define dso_local void @test_alloca_with_align(
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void test_alloca_with_align(int n) {
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capture(__builtin_alloca_with_align(n, 64));
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// CHECK: %[[arg:.*]] = alloca i8, i32 %{{.*}}, align 8
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// CHECK: call void @capture(i8* noundef %[[arg]])
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}
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