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| author | Stephen Hines <srhines@google.com> | 2015-03-23 12:10:34 -0700 |
|---|---|---|
| committer | Stephen Hines <srhines@google.com> | 2015-03-23 12:10:34 -0700 |
| commit | ebe69fe11e48d322045d5949c83283927a0d790b (patch) | |
| tree | c92f1907a6b8006628a4b01615f38264d29834ea /test/CodeGen/X86/huge-stack-offset.ll | |
| parent | b7d2e72b02a4cb8034f32f8247a2558d2434e121 (diff) | |
| download | external_llvm-ebe69fe11e48d322045d5949c83283927a0d790b.zip external_llvm-ebe69fe11e48d322045d5949c83283927a0d790b.tar.gz external_llvm-ebe69fe11e48d322045d5949c83283927a0d790b.tar.bz2 | |
Update aosp/master LLVM for rebase to r230699.
Change-Id: I2b5be30509658cb8266be782de0ab24f9099f9b9
Diffstat (limited to 'test/CodeGen/X86/huge-stack-offset.ll')
| -rw-r--r-- | test/CodeGen/X86/huge-stack-offset.ll | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/test/CodeGen/X86/huge-stack-offset.ll b/test/CodeGen/X86/huge-stack-offset.ll new file mode 100644 index 0000000..6195161 --- /dev/null +++ b/test/CodeGen/X86/huge-stack-offset.ll @@ -0,0 +1,59 @@ +; RUN: llc < %s -mtriple=x86_64-linux-unknown | FileCheck %s --check-prefix=CHECK-64 +; RUN: llc < %s -mtriple=i386-linux-unknown | FileCheck %s --check-prefix=CHECK-32 + +; Test that a large stack offset uses a single add/sub instruction to +; adjust the stack pointer. + +define void @foo() nounwind { +; CHECK-64-LABEL: foo: +; CHECK-64: movabsq $50000000{{..}}, %rax +; CHECK-64-NEXT: subq %rax, %rsp +; CHECK-64-NOT: subq $2147483647, %rsp +; CHECK-64: movabsq $50000000{{..}}, [[RAX:%r..]] +; CHECK-64-NEXT: addq [[RAX]], %rsp + +; CHECK-32-LABEL: foo: +; CHECK-32: movl $50000000{{..}}, %eax +; CHECK-32-NEXT: subl %eax, %esp +; CHECK-32-NOT: subl $2147483647, %esp +; CHECK-32: movl $50000000{{..}}, [[EAX:%e..]] +; CHECK-32-NEXT: addl [[EAX]], %esp + %1 = alloca [5000000000 x i8], align 16 + %2 = getelementptr inbounds [5000000000 x i8]* %1, i32 0, i32 0 + call void @bar(i8* %2) + ret void +} + +; Verify that we do not clobber the return value. + +define i32 @foo2() nounwind { +; CHECK-64-LABEL: foo2: +; CHECK-64: movl $10, %eax +; CHECK-64-NOT: movabsq ${{.*}}, %rax + +; CHECK-32-LABEL: foo2: +; CHECK-32: movl $10, %eax +; CHECK-32-NOT: movl ${{.*}}, %eax + %1 = alloca [5000000000 x i8], align 16 + %2 = getelementptr inbounds [5000000000 x i8]* %1, i32 0, i32 0 + call void @bar(i8* %2) + ret i32 10 +} + +; Verify that we do not clobber EAX when using inreg attribute + +define i32 @foo3(i32 inreg %x) nounwind { +; CHECK-64-LABEL: foo3: +; CHECK-64: movabsq $50000000{{..}}, %rax +; CHECK-64-NEXT: subq %rax, %rsp + +; CHECK-32-LABEL: foo3: +; CHECK-32: subl $2147483647, %esp +; CHECK-32-NOT: movl ${{.*}}, %eax + %1 = alloca [5000000000 x i8], align 16 + %2 = getelementptr inbounds [5000000000 x i8]* %1, i32 0, i32 0 + call void @bar(i8* %2) + ret i32 %x +} + +declare void @bar(i8*) |