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.)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98077
91177308-0d34-0410-b5e6-
96231b3b80d8
false, false, 0);
}
+ // On Darwin, R12 must contain the address of an indirect callee. This does
+ // not mean the MTCTR instruction must use R12; it's easier to model this as
+ // an extra parameter, so do that.
+ if (!isTailCall &&
+ !dyn_cast<GlobalAddressSDNode>(Callee) &&
+ !dyn_cast<ExternalSymbolSDNode>(Callee) &&
+ !isBLACompatibleAddress(Callee, DAG))
+ RegsToPass.push_back(std::make_pair((unsigned)(isPPC64 ? PPC::X12 :
+ PPC::R12), Callee));
+
// Build a sequence of copy-to-reg nodes chained together with token chain
// and flag operands which copy the outgoing args into the appropriate regs.
SDValue InFlag;
--- /dev/null
+; 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
+}