The address of an indirect call must be in R12 on Darwin.

Make it so.  (This patch is in LowerCall_Darwin, which seems
to be used by SVR4 code as well; since that doesn't belong here,
I haven't worried about this case.)

llvm-svn: 98077

1 files changed, 19 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/PowerPC/2010-03-09-indirect-call.ll b/llvm/test/CodeGen/PowerPC/2010-03-09-indirect-call.ll
new file mode 100644
index 00000000000..d09450950d0
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/2010-03-09-indirect-call.ll
@@ -0,0 +1,19 @@
+; RUN: llc < %s -march=ppc32 -mcpu=g5 -mtriple=powerpc-apple-darwin10.0 | FileCheck %s
+; ModuleID = 'nn.c'
+target datalayout = "E-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f128:64:128"
+target triple = "powerpc-apple-darwin11.0"
+; Indirect calls must use R12 on Darwin (i.e., R12 must contain the address of
+; the function being called; the mtctr is not required to use it).
+
+@p = external global void (...)*                  ; <void (...)**> [#uses=1]
+
+define void @foo() nounwind ssp {
+entry:
+; CHECK: mtctr r12
+  %0 = load void (...)** @p, align 4              ; <void (...)*> [#uses=1]
+  call void (...)* %0() nounwind
+  br label %return
+
+return:                                           ; preds = %entry
+  ret void
+}