CodeGen peephole: fold redundant phys reg copies

[oota-llvm.git] / test / CodeGen / X86 / fp-stack-2results.ll

diff --git a/test/CodeGen/X86/fp-stack-2results.ll b/test/CodeGen/X86/fp-stack-2results.ll
index dcb2031a504d6b89d6df47c732367633fd018d49..c8da9ea02518d905f7be252d5a2f30705c615991 100644 (file)
--- a/test/CodeGen/X86/fp-stack-2results.ll
+++ b/test/CodeGen/X86/fp-stack-2results.ll
@@ -1,12 +1,16 @@
-; RUN: llvm-as < %s | llc -march=x86 | grep fldz
-; RUN: llvm-as < %s | llc -march=x86-64 | grep fld1
+; RUN: llc < %s -march=x86 | grep fldz
+; RUN: llc < %s -march=x86-64 | grep fld1
+
+%0 = type { x86_fp80, x86_fp80 }
 
 ; This is basically this code on x86-64:
 ; _Complex long double test() { return 1.0; }
-define {x86_fp80, x86_fp80} @test() {
+define %0 @test() {
   %A = fpext double 1.0 to x86_fp80
   %B = fpext double 0.0 to x86_fp80
-  ret x86_fp80 %A, x86_fp80 %B
+  %mrv = insertvalue %0 undef, x86_fp80 %A, 0
+  %mrv1 = insertvalue %0 %mrv, x86_fp80 %B, 1
+  ret %0 %mrv1
 }
 
 
@@ -14,8 +18,49 @@ define {x86_fp80, x86_fp80} @test() {
 ;      fld1
 ;      fld     %st(0)
 ;      ret
-define {x86_fp80, x86_fp80} @test2() {
+define %0 @test2() {
   %A = fpext double 1.0 to x86_fp80
-  ret x86_fp80 %A, x86_fp80 %A
+  %mrv = insertvalue %0 undef, x86_fp80 %A, 0
+  %mrv1 = insertvalue %0 %mrv, x86_fp80 %A, 1
+  ret %0 %mrv1
+}
+
+; Uses both values.
+define void @call1(x86_fp80 *%P1, x86_fp80 *%P2) {
+  %a = call %0 @test()
+  %b = extractvalue %0 %a, 0
+  store x86_fp80 %b, x86_fp80* %P1
+
+  %c = extractvalue %0 %a, 1
+  store x86_fp80 %c, x86_fp80* %P2
+  ret void 
+}
+
+; Uses both values, requires fxch
+define void @call2(x86_fp80 *%P1, x86_fp80 *%P2) {
+  %a = call %0 @test()
+  %b = extractvalue %0 %a, 1
+  store x86_fp80 %b, x86_fp80* %P1
+
+  %c = extractvalue %0 %a, 0
+  store x86_fp80 %c, x86_fp80* %P2
+  ret void
+}
+
+; Uses ST(0), ST(1) is dead but must be popped.
+define void @call3(x86_fp80 *%P1, x86_fp80 *%P2) {
+  %a = call %0 @test()
+  %b = extractvalue %0 %a, 0
+  store x86_fp80 %b, x86_fp80* %P1
+  ret void 
+}
+
+; Uses ST(1), ST(0) is dead and must be popped.
+define void @call4(x86_fp80 *%P1, x86_fp80 *%P2) {
+  %a = call %0 @test()
+
+  %c = extractvalue %0 %a, 1
+  store x86_fp80 %c, x86_fp80* %P2
+  ret void 
 }