Don't spill PPC VRSAVE on non-Darwin (even in SjLj)
As Bill Schmidt pointed out to me, only on Darwin do we need to spill/restore
VRSAVE in the SjLj code. For non-Darwin, don't spill/restore VRSAVE (and I've
added some asserts to make sure that we're not).
As it turns out, we're not currently handling the Darwin case correctly (I've
added a FIXME in the test case). I've tried adding various implied register
definitions/uses to force the spill without success, so I'll need to address
this later.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178096 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/PowerPC/sjlj.ll b/test/CodeGen/PowerPC/sjlj.ll
index 3440b31..7ea35da 100644
--- a/test/CodeGen/PowerPC/sjlj.ll
+++ b/test/CodeGen/PowerPC/sjlj.ll
@@ -57,8 +57,12 @@
%3 = load i32* %retval
ret i32 %3
+; FIXME: We should be saving VRSAVE on Darwin, but we're not!
+
; CHECK: @main
; CHECK: std
+; Make sure that we're not saving VRSAVE on non-Darwin:
+; CHECK-NOT: mfspr
; CHECK: stfd
; CHECK: stvx
diff --git a/test/CodeGen/PowerPC/vrsave-spill.ll b/test/CodeGen/PowerPC/vrsave-spill.ll
index d4b07bc..c73206d 100644
--- a/test/CodeGen/PowerPC/vrsave-spill.ll
+++ b/test/CodeGen/PowerPC/vrsave-spill.ll
@@ -1,18 +1,19 @@
-; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=g5 | FileCheck %s
+; RUN: llc < %s -mtriple=powerpc64-apple-darwin -mcpu=g5 | FileCheck %s
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-f128:128:128-v128:128:128-n32:64"
-target triple = "powerpc64-unknown-linux-gnu"
+target triple = "powerpc64-apple-darwin"
define <4 x float> @foo(<4 x float> %a, <4 x float> %b) nounwind {
entry:
%c = fadd <4 x float> %a, %b
+ %d = fmul <4 x float> %c, %a
call void asm sideeffect "", "~{VRsave}"() nounwind
br label %return
; CHECK: @foo
-; CHECK: mfspr {{[0-9]+}}, 256
-; CHECK: mtspr 256, {{[0-9]+}}
+; CHECK: mfspr r{{[0-9]+}}, 256
+; CHECK: mtspr 256, r{{[0-9]+}}
return: ; preds = %entry
- ret <4 x float> %c
+ ret <4 x float> %d
}