[X86] Fix stack alignment for MCU target, by Anton Nadolskiy.

This patch fixes stack alignments for MCU (should be aligned to 4 bytes).

Differential Revision: http://reviews.llvm.org/D15646

llvm-svn: 260375

1 files changed, 47 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/X86/mcu-abi.ll b/llvm/test/CodeGen/X86/mcu-abi.ll
index 966fd4521f2..263ddcf080e 100644
--- a/llvm/test/CodeGen/X86/mcu-abi.ll
+++ b/llvm/test/CodeGen/X86/mcu-abi.ll
@@ -82,6 +82,8 @@ entry:
   ret i32 %i1
 }
 
+%struct.S = type { i8 }
+
 ; CHECK-LABEL: test_lib_args:
 ; CHECK: movl %edx, %eax
 ; CHECK: calll __fixsfsi
@@ -108,5 +110,50 @@ define i32 @test_fp128(fp128* %ptr) #0 {
 
 declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i32, i1) #1
 
+; CHECK-LABEL: test_alignment_d:
+; CHECK-NOT: andl  {{.+}}, %esp
+define void @test_alignment_d() #0 {
+entry:
+  %d = alloca double
+  store double 2.000000e+00, double* %d
+  call void @food(double* inreg %d) 
+  ret void
+}
+
+; CHECK-LABEL: test_alignment_i:
+; CHECK-NOT: andl  {{.+}}, %esp
+define void @test_alignment_i() #0 {
+entry:
+  %i = alloca i64
+  store i64 2, i64* %i
+  call void @fooi(i64* inreg %i) 
+  ret void
+}
+
+
+; CHECK-LABEL: test_alignment_s:
+; CHECK-NOT: andl  {{.+}}, %esp
+define void @test_alignment_s() #0 {
+  %s = alloca %struct.S, align 4
+  call void @foos(%struct.S* inreg %s) 
+  ret void
+}
+
+
+; CHECK-LABEL: test_alignment_fp:
+; CHECK-NOT: andl  {{.+}}, %esp
+define void @test_alignment_fp() #0 {
+entry:
+  %f = alloca fp128
+  store fp128 0xL00000000000000004000000000000000, fp128* %f
+  call void @foofp(fp128* inreg %f)
+  ret void
+}
+
+declare void @food(double* inreg)
+declare void @fooi(i64* inreg)
+declare void @foos(%struct.S* inreg)
+declare void @foofp(fp128* inreg)
+
 attributes #0 = { nounwind "use-soft-float"="true"}
 attributes #1 = { nounwind argmemonly }