From: Evan Cheng <evan.cheng@apple.com>
Date: Thu, 24 Jul 2008 08:17:07 +0000 (+0000)
Subject: Fix a catastrophic PPC64 ABI bug: i32 operands which are passed in memory (all of... 
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=982a05955ae9cfa71b8c6f3e80fed8ce5b778a1e;p=oota-llvm.git

Fix a catastrophic PPC64 ABI bug: i32 operands which are passed in memory (all of the parameter registers are used) are loaded from sp offsets that were off by 4.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53979 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index 2ea48cf89db..6bf147a6ad9 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -1582,6 +1582,7 @@ PPCTargetLowering::LowerFORMAL_ARGUMENTS(SDOperand Op,
         ++GPR_idx;
       } else {
         needsLoad = true;
+        ArgSize = PtrByteSize;
       }
       // All int arguments reserve stack space in Macho ABI.
       if (isMachoABI || needsLoad) ArgOffset += 8;
diff --git a/test/CodeGen/PowerPC/2008-07-24-PPC64-CCBug.ll b/test/CodeGen/PowerPC/2008-07-24-PPC64-CCBug.ll
new file mode 100644
index 00000000000..2ccca25e2a2
--- /dev/null
+++ b/test/CodeGen/PowerPC/2008-07-24-PPC64-CCBug.ll
@@ -0,0 +1,11 @@
+; RUN: llvm-as < %s | llc -mtriple=powerpc64-apple-darwin | grep lwz | grep 228
+
+@"\01LC" = internal constant [4 x i8] c"%d\0A\00"		; <[4 x i8]*> [#uses=1]
+
+define void @llvm_static_func(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4, i32 %a5, i32 %a6, i32 %a7, i32 %a8, i32 %a9, i32 %a10, i32 %a11, i32 %a12, i32 %a13, i32 %a14, i32 %a15) nounwind  {
+entry:
+	tail call i32 (i8*, ...)* @printf( i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i64 0), i32 %a8 ) nounwind 		; <i32>:0 [#uses=0]
+	ret void
+}
+
+declare i32 @printf(i8*, ...) nounwind