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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
28 lines
943 B
C
28 lines
943 B
C
// RUN: %clang_cc1 -triple sparc-unknown-unknown -emit-llvm -o - %s | FileCheck %s
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// Ensure that we pass proper alignment to llvm in the call
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// instruction. The proper alignment for the type is sometimes known
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// only by clang, and is not manifest in the LLVM-type. So, it must be
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// explicitly passed through. (Besides the case of the user specifying
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// alignment, as here, this situation also occurrs for non-POD C++
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// structs with tail-padding: clang emits these as packed llvm-structs
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// for ABI reasons.)
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struct s1 {
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int x;
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} __attribute__((aligned(8)));
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struct s1 x1;
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// Ensure the align 8 is passed through:
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// CHECK-LABEL: define{{.*}} void @f1()
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// CHECK: call void @f1_helper(%struct.s1* noundef byval(%struct.s1) align 8 @x1)
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// Also ensure the declaration of f1_helper includes it
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// CHECK: declare void @f1_helper(%struct.s1* noundef byval(%struct.s1) align 8)
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void f1_helper(struct s1);
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void f1() {
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f1_helper(x1);
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}
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