[llvm] r234686 - [PowerPC] Disable part-word atomics on the P7

[Hal Finkel]

Author: hfinkel
Date: Sat Apr 11 08:40:36 2015
New Revision: 234686

URL: http://llvm.org/viewvc/llvm-project?rev=234686&view=rev
Log:
[PowerPC] Disable part-word atomics on the P7

As it turns out, even though these are part of ISA 2.06, the P7 does not
support them (or, at least, not any P7s we're tested so far).

Modified:
    llvm/trunk/lib/Target/PowerPC/PPC.td
    llvm/trunk/test/CodeGen/PowerPC/atomic-2.ll

Modified: llvm/trunk/lib/Target/PowerPC/PPC.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/PPC.td?rev=234686&r1=234685&r2=234686&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/PPC.td (original)
+++ llvm/trunk/lib/Target/PowerPC/PPC.td Sat Apr 11 08:40:36 2015
@@ -163,12 +163,12 @@ def ProcessorFeatures {
        FeatureRecipPrec, FeatureSTFIWX, FeatureLFIWAX,
        FeatureFPRND, FeatureFPCVT, FeatureISEL,
        FeaturePOPCNTD, FeatureCMPB, FeatureLDBRX,
-       Feature64Bit /*, Feature64BitRegs */, FeaturePartwordAtomic,
+       Feature64Bit /*, Feature64BitRegs */,
        FeatureBPERMD, FeatureExtDiv,
        DeprecatedMFTB, DeprecatedDST];
   list<SubtargetFeature> Power8SpecificFeatures =
       [DirectivePwr8, FeatureP8Altivec, FeatureP8Vector, FeatureP8Crypto,
-       FeatureHTM, FeatureDirectMove, FeatureICBT];
+       FeatureHTM, FeatureDirectMove, FeatureICBT, FeaturePartwordAtomic];
   list<SubtargetFeature> Power8FeatureList =
       !listconcat(Power7FeatureList, Power8SpecificFeatures);
 }

Modified: llvm/trunk/test/CodeGen/PowerPC/atomic-2.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/PowerPC/atomic-2.ll?rev=234686&r1=234685&r2=234686&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/PowerPC/atomic-2.ll (original)
+++ llvm/trunk/test/CodeGen/PowerPC/atomic-2.ll Sat Apr 11 08:40:36 2015
@@ -1,6 +1,6 @@
 ; RUN: llc < %s -march=ppc64 | FileCheck %s
-; RUN: llc < %s -march=ppc64 -mcpu=pwr7 | FileCheck %s -check-prefix=CHECK-P7U
-; RUN: llc < %s -march=ppc64 -mcpu=pwr8 | FileCheck %s -check-prefix=CHECK-P7U
+; RUN: llc < %s -march=ppc64 -mcpu=pwr7 | FileCheck %s
+; RUN: llc < %s -march=ppc64 -mcpu=pwr8 | FileCheck %s -check-prefix=CHECK-P8U
 
 define i64 @exchange_and_add(i64* %mem, i64 %val) nounwind {
 ; CHECK-LABEL: exchange_and_add:
@@ -12,17 +12,17 @@ define i64 @exchange_and_add(i64* %mem,
 
 define i8 @exchange_and_add8(i8* %mem, i8 %val) nounwind {
 ; CHECK-LABEL: exchange_and_add8:
-; CHECK-P7U: lbarx
+; CHECK-P8U: lbarx
   %tmp = atomicrmw add i8* %mem, i8 %val monotonic
-; CHECK-P7U: stbcx.
+; CHECK-P8U: stbcx.
   ret i8 %tmp
 }
 
 define i16 @exchange_and_add16(i16* %mem, i16 %val) nounwind {
 ; CHECK-LABEL: exchange_and_add16:
-; CHECK-P7U: lharx
+; CHECK-P8U: lharx
   %tmp = atomicrmw add i16* %mem, i16 %val monotonic
-; CHECK-P7U: sthcx.
+; CHECK-P8U: sthcx.
   ret i16 %tmp
 }
 
@@ -38,21 +38,21 @@ define i64 @exchange_and_cmp(i64* %mem)
 
 define i8 @exchange_and_cmp8(i8* %mem) nounwind {
 ; CHECK-LABEL: exchange_and_cmp8:
-; CHECK-P7U: lbarx
+; CHECK-P8U: lbarx
   %tmppair = cmpxchg i8* %mem, i8 0, i8 1 monotonic monotonic
   %tmp = extractvalue { i8, i1 } %tmppair, 0
-; CHECK-P7U: stbcx.
-; CHECK-P7U: stbcx.
+; CHECK-P8U: stbcx.
+; CHECK-P8U: stbcx.
   ret i8 %tmp
 }
 
 define i16 @exchange_and_cmp16(i16* %mem) nounwind {
 ; CHECK-LABEL: exchange_and_cmp16:
-; CHECK-P7U: lharx
+; CHECK-P8U: lharx
   %tmppair = cmpxchg i16* %mem, i16 0, i16 1 monotonic monotonic
   %tmp = extractvalue { i16, i1 } %tmppair, 0
-; CHECK-P7U: sthcx.
-; CHECK-P7U: sthcx.
+; CHECK-P8U: sthcx.
+; CHECK-P8U: sthcx.
   ret i16 %tmp
 }
 
@@ -66,17 +66,17 @@ define i64 @exchange(i64* %mem, i64 %val
 
 define i8 @exchange8(i8* %mem, i8 %val) nounwind {
 ; CHECK-LABEL: exchange8:
-; CHECK-P7U: lbarx
+; CHECK-P8U: lbarx
   %tmp = atomicrmw xchg i8* %mem, i8 1 monotonic
-; CHECK-P7U: stbcx.
+; CHECK-P8U: stbcx.
   ret i8 %tmp
 }
 
 define i16 @exchange16(i16* %mem, i16 %val) nounwind {
 ; CHECK-LABEL: exchange16:
-; CHECK-P7U: lharx
+; CHECK-P8U: lharx
   %tmp = atomicrmw xchg i16* %mem, i16 1 monotonic
-; CHECK-P7U: sthcx.
+; CHECK-P8U: sthcx.
   ret i16 %tmp
 }