Implement -mno-sse: if SSE is disabled on x86-64, don't store XMM on stack for
var-args, and don't allow FP return values
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63495 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/nosse-varargs.ll b/test/CodeGen/X86/nosse-varargs.ll
new file mode 100644
index 0000000..e6da0ab
--- /dev/null
+++ b/test/CodeGen/X86/nosse-varargs.ll
@@ -0,0 +1,46 @@
+; RUN: llvm-as < %s > %t
+; RUN: llc -march=x86-64 -mattr=-sse < %t | not grep xmm
+; RUN: llc -march=x86-64 < %t | grep xmm
+; PR3403
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
+target triple = "x86_64-unknown-linux-gnu"
+ %struct.__va_list_tag = type { i32, i32, i8*, i8* }
+
+define i32 @foo(float %a, i8* nocapture %fmt, ...) nounwind {
+entry:
+ %ap = alloca [1 x %struct.__va_list_tag], align 8 ; <[1 x %struct.__va_list_tag]*> [#uses=4]
+ %ap12 = bitcast [1 x %struct.__va_list_tag]* %ap to i8* ; <i8*> [#uses=2]
+ call void @llvm.va_start(i8* %ap12)
+ %0 = getelementptr [1 x %struct.__va_list_tag]* %ap, i64 0, i64 0, i32 0 ; <i32*> [#uses=2]
+ %1 = load i32* %0, align 8 ; <i32> [#uses=3]
+ %2 = icmp ult i32 %1, 48 ; <i1> [#uses=1]
+ br i1 %2, label %bb, label %bb3
+
+bb: ; preds = %entry
+ %3 = getelementptr [1 x %struct.__va_list_tag]* %ap, i64 0, i64 0, i32 3 ; <i8**> [#uses=1]
+ %4 = load i8** %3, align 8 ; <i8*> [#uses=1]
+ %5 = inttoptr i32 %1 to i8* ; <i8*> [#uses=1]
+ %6 = ptrtoint i8* %5 to i64 ; <i64> [#uses=1]
+ %ctg2 = getelementptr i8* %4, i64 %6 ; <i8*> [#uses=1]
+ %7 = add i32 %1, 8 ; <i32> [#uses=1]
+ store i32 %7, i32* %0, align 8
+ br label %bb4
+
+bb3: ; preds = %entry
+ %8 = getelementptr [1 x %struct.__va_list_tag]* %ap, i64 0, i64 0, i32 2 ; <i8**> [#uses=2]
+ %9 = load i8** %8, align 8 ; <i8*> [#uses=2]
+ %10 = getelementptr i8* %9, i64 8 ; <i8*> [#uses=1]
+ store i8* %10, i8** %8, align 8
+ br label %bb4
+
+bb4: ; preds = %bb3, %bb
+ %addr.0.0 = phi i8* [ %ctg2, %bb ], [ %9, %bb3 ] ; <i8*> [#uses=1]
+ %11 = bitcast i8* %addr.0.0 to i32* ; <i32*> [#uses=1]
+ %12 = load i32* %11, align 4 ; <i32> [#uses=1]
+ call void @llvm.va_end(i8* %ap12)
+ ret i32 %12
+}
+
+declare void @llvm.va_start(i8*) nounwind
+
+declare void @llvm.va_end(i8*) nounwind