Add patch to fix register spilling on powerpcspe

debian/changelog

@@ -2,6 +2,7 @@ llvm-toolchain-7 (1:7.0.1~+rc2-9) UNRELEASED; urgency=medium
 
   [ John Paul Adrian Glaubitz ]
   * Add patch to add powerpcspe support to clang
+  * Add patch to fix register spilling on powerpcspe
 
  -- John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>  Wed, 05 Dec 2018 09:22:19 +0100
 

debian/patches/D54409-powerpcspe-register-spilling.diff

@@ -0,0 +1,88 @@
+Description: PowerPC/SPE: Fix register spilling for SPE registers
+Author: Justin Hibbits <jrh29@alumni.cwru.edu>
+Origin: https://reviews.llvm.org/D54409
+Last-Update: 2018-12-05
+
+--- llvm-toolchain-7-7.0.1~+rc2.orig/lib/Target/PowerPC/PPCRegisterInfo.cpp
++++ llvm-toolchain-7-7.0.1~+rc2/lib/Target/PowerPC/PPCRegisterInfo.cpp
+@@ -844,6 +844,9 @@ static unsigned offsetMinAlign(const Mac
+   case PPC::STXSD:
+   case PPC::STXSSP:
+     return 4;
++  case PPC::EVLDD:
++  case PPC::EVSTDD:
++    return 8;
+   case PPC::LXV:
+   case PPC::STXV:
+     return 16;
+@@ -960,7 +963,10 @@ PPCRegisterInfo::eliminateFrameIndex(Mac
+   // happen in invalid code.
+   assert(OpC != PPC::DBG_VALUE &&
+          "This should be handled in a target-independent way");
+-  if (!noImmForm && ((isInt<16>(Offset) &&
++  bool canBeImmediate = (OpC == PPC::EVSTDD || OpC == PPC::EVLDD) ?
++                        isUInt<8>(Offset) :
++                        isInt<16>(Offset);
++  if (!noImmForm && ((canBeImmediate &&
+                       ((Offset % offsetMinAlign(MI)) == 0)) ||
+                      OpC == TargetOpcode::STACKMAP ||
+                      OpC == TargetOpcode::PATCHPOINT)) {
+--- llvm-toolchain-7-7.0.1~+rc2.orig/test/CodeGen/PowerPC/spe.ll
++++ llvm-toolchain-7-7.0.1~+rc2/test/CodeGen/PowerPC/spe.ll
+@@ -525,18 +525,53 @@ entry:
+ ; CHECK: #NO_APP
+ }
+ 
+-define double @test_spill(double %a) nounwind {
++declare double @test_spill_spe_regs(double, double);
++define dso_local void @test_func2() #0 {
+ entry:
++  ret void
++}
++
++@global_var1 = global i32 0, align 4
++define double @test_spill(double %a, i32 %a1, i64 %a2, i8 * %a3, i32 *%a4, i32* %a5) nounwind {
++entry:
++  %a.addr = alloca double, align 8
++  %a1.addr = alloca i32, align 4
++  %a2.addr = alloca i64, align 8
++  %a3.addr = alloca i8*, align 4
++  %a4.addr = alloca i32*, align 4
++  %a5.addr = alloca i32*, align 4
++  %ptr = alloca i32*, align 4
++  %v1 = alloca [8 x i32], align 4
++  %v2 = alloca [7 x i32], align 4
++  %v3 = alloca [5 x i32], align 4
++  store i32 %a1, i32* %a1.addr, align 4
++  store i64 %a2, i64* %a2.addr, align 8
++  store i8* %a3, i8** %a3.addr, align 4
++  store i32* %a4, i32** %a4.addr, align 4
++  store i32* %a5, i32** %a5.addr, align 4
++  store i32* @global_var1, i32** %ptr, align 4
+   %0 = fadd double %a, %a
+-  call void asm sideeffect "","~{r0},~{r3},~{s4},~{r5},~{r6},~{r7},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{r16},~{r17},~{r18},~{r19},~{r20},~{r21},~{r22},~{r23},~{r24},~{r25},~{r26},~{r27},~{r28},~{r29},~{r30},~{r31}"() nounwind
++  call void asm sideeffect "","~{s0},~{s3},~{s4},~{s5},~{s6},~{s7},~{s8},~{s9},~{s10},~{s11},~{s12},~{s13},~{s14},~{s15},~{s16},~{s17},~{s18},~{s19},~{s20},~{s21},~{s22},~{s23},~{s24},~{s25},~{s26},~{s27},~{s28},~{s29},~{s30},~{s31}"() nounwind
+   %1 = fadd double %0, 3.14159
++  %2 = load i32*, i32** %ptr, align 4
++  %3 = bitcast [8 x i32]* %v1 to i8*
++  call void @llvm.memset.p0i8.i32(i8* align 4 %3, i8 0, i32 24, i1 true)
++  %4 = load i32*, i32** %a5.addr, align 4
++  store i32 0, i32* %4, align 4
++  call void @test_func2()
++  %5 = bitcast [7 x i32]* %v2 to i8*
++  call void @llvm.memset.p0i8.i32(i8* align 4 %5, i8 0, i32 20, i1 true)
+   br label %return
+ 
+ return:
+   ret double %1
+ 
+ ; CHECK-LABEL: test_spill
+-; CHECK: efdadd
++; CHECK: li [[VREG:[0-9]+]], 256
++; CHECK: evstddx {{[0-9]+}}, {{[0-9]+}}, [[VREG]]
++; CHECK-NOT: evstdd {{[0-9]+}}, 256({{[0-9]+}}
+ ; CHECK: evstdd
++; CHECK: efdadd
+ ; CHECK: evldd
+ }
++declare void @llvm.memset.p0i8.i32(i8* nocapture writeonly, i8, i32, i1) #1

debian/patches/series

@@ -106,3 +106,4 @@ strip-ignore-deterministic-archives.diff
 
 # powerpcspe
 D49754-powerpcspe-clang.diff
+D54409-powerpcspe-register-spilling.diff