forked from OSchip/llvm-project
53 lines
2.0 KiB
C++
53 lines
2.0 KiB
C++
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// RUN: %clang_cc1 -fms-extensions -w -triple i386-pc-win32 -emit-llvm -o - %s | FileCheck %s
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// PR44395
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// MSVC passes overaligned types indirectly since MSVC 2015. Make sure that
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// works with inalloca.
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// FIXME: Pass non-trivial *and* overaligned types indirectly. Right now the C++
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// ABI rules say to use inalloca, and they take precedence, so it's not easy to
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// implement this.
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struct NonTrivial {
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NonTrivial();
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NonTrivial(const NonTrivial &o);
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int x;
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};
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struct __declspec(align(64)) OverAligned {
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OverAligned();
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int buf[16];
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};
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extern int gvi32;
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int receive_inalloca_overaligned(NonTrivial nt, OverAligned o) {
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return nt.x + o.buf[0];
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}
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// CHECK-LABEL: define dso_local i32 @"?receive_inalloca_overaligned@@Y{{.*}}"
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// CHECK-SAME: (<{ %struct.NonTrivial, %struct.OverAligned* }>* inalloca %0)
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int pass_inalloca_overaligned() {
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gvi32 = receive_inalloca_overaligned(NonTrivial(), OverAligned());
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return gvi32;
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}
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// CHECK-LABEL: define dso_local i32 @"?pass_inalloca_overaligned@@Y{{.*}}"
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// CHECK: [[TMP:%[^ ]*]] = alloca %struct.OverAligned, align 64
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// CHECK: call i8* @llvm.stacksave()
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// CHECK: alloca inalloca <{ %struct.NonTrivial, %struct.OverAligned* }>
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// Construct OverAligned into TMP.
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// CHECK: call x86_thiscallcc %struct.OverAligned* @"??0OverAligned@@QAE@XZ"(%struct.OverAligned* [[TMP]])
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// Construct NonTrivial into the GEP.
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// CHECK: [[GEP:%[^ ]*]] = getelementptr inbounds <{ %struct.NonTrivial, %struct.OverAligned* }>, <{ %struct.NonTrivial, %struct.OverAligned* }>* %{{.*}}, i32 0, i32 0
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// CHECK: call x86_thiscallcc %struct.NonTrivial* @"??0NonTrivial@@QAE@XZ"(%struct.NonTrivial* [[GEP]])
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// Store the address of an OverAligned temporary into the struct.
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// CHECK: getelementptr inbounds <{ %struct.NonTrivial, %struct.OverAligned* }>, <{ %struct.NonTrivial, %struct.OverAligned* }>* %{{.*}}, i32 0, i32 1
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// CHECK: store %struct.OverAligned* [[TMP]], %struct.OverAligned** %{{.*}}, align 4
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// CHECK: call i32 @"?receive_inalloca_overaligned@@Y{{.*}}"(<{ %struct.NonTrivial, %struct.OverAligned* }>* inalloca %argmem)
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