[llvm] r335043 - [PowerPC] Fix label address calculation for ppc32
Strahinja Petrovic via llvm-commits
llvm-commits at lists.llvm.org
Tue Jun 19 06:07:41 PDT 2018
Author: spetrovic
Date: Tue Jun 19 06:07:40 2018
New Revision: 335043
URL: http://llvm.org/viewvc/llvm-project?rev=335043&view=rev
Log:
[PowerPC] Fix label address calculation for ppc32
This patch fixes calculating address of label on ppc32 (for -fPIC).
Differential Revision: https://reviews.llvm.org/D46582
Added:
llvm/trunk/test/CodeGen/PowerPC/ppc-label.ll
Modified:
llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp
Modified: llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp?rev=335043&r1=335042&r2=335043&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/PowerPC/PPCISelLowering.cpp Tue Jun 19 06:07:40 2018
@@ -2581,10 +2581,11 @@ SDValue PPCTargetLowering::LowerBlockAdd
// 64-bit SVR4 ABI code is always position-independent.
// The actual BlockAddress is stored in the TOC.
- if (Subtarget.isSVR4ABI() && Subtarget.isPPC64()) {
- setUsesTOCBasePtr(DAG);
+ if (Subtarget.isSVR4ABI() && isPositionIndependent()) {
+ if (Subtarget.isPPC64())
+ setUsesTOCBasePtr(DAG);
SDValue GA = DAG.getTargetBlockAddress(BA, PtrVT, BASDN->getOffset());
- return getTOCEntry(DAG, SDLoc(BASDN), true, GA);
+ return getTOCEntry(DAG, SDLoc(BASDN), Subtarget.isPPC64(), GA);
}
unsigned MOHiFlag, MOLoFlag;
Added: llvm/trunk/test/CodeGen/PowerPC/ppc-label.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/PowerPC/ppc-label.ll?rev=335043&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/PowerPC/ppc-label.ll (added)
+++ llvm/trunk/test/CodeGen/PowerPC/ppc-label.ll Tue Jun 19 06:07:40 2018
@@ -0,0 +1,44 @@
+; RUN: llc < %s -mtriple=powerpc-unknown-linux-gnu -relocation-model=pic | FileCheck %s
+
+; unsigned int foo(void) {
+; return 0;
+; }
+;
+; int main() {
+; L: __attribute__ ((unused));
+; static const unsigned int arr[] =
+; {
+; (unsigned int) &&x - (unsigned int)&&L ,
+; (unsigned int) &&y - (unsigned int)&&L
+; };
+;
+; unsigned int ret = foo();
+; void* g = (void *) ((unsigned int)&&L + arr[ret]);
+; goto *g;
+;
+; x:
+; return 15;
+; y:
+; return 25;
+; }
+
+define i32 @foo() local_unnamed_addr {
+entry:
+ ret i32 0
+}
+
+define i32 @main() {
+entry:
+ br label %L
+
+L: ; preds = %L, %entry
+ indirectbr i8* inttoptr (i32 add (i32 ptrtoint (i8* blockaddress(@main, %L) to i32), i32 sub (i32 ptrtoint (i8* blockaddress(@main, %return) to i32), i32 ptrtoint (i8* blockaddress(@main, %L) to i32))) to i8*), [label %return, label %L]
+
+return: ; preds = %L
+ ret i32 15
+}
+
+
+; CHECK: lwz 3, .LC0-.LTOC(30)
+; CHECK-NOT: li 3, .Ltmp1-.L1$pb at l
+; CHECK-NOT: addis 4, 30, .Ltmp1-.L1$pb at ha
\ No newline at end of file
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