diff options
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCInstrInfo.cpp | 6 | ||||
| -rw-r--r-- | llvm/test/CodeGen/PowerPC/fma-mutate.ll | 21 | ||||
| -rw-r--r-- | llvm/test/CodeGen/PowerPC/recipest.ll | 4 |
3 files changed, 29 insertions, 2 deletions
diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp index ff2633eac3f..daf8790fefc 100644 --- a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp +++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp @@ -1754,6 +1754,12 @@ protected: unsigned OldFMAReg = MI->getOperand(0).getReg(); + // The transformation doesn't work well with things like: + // %vreg5 = A-form-op %vreg5, %vreg11, %vreg5; + // so leave such things alone. + if (OldFMAReg == KilledProdReg) + continue; + assert(OldFMAReg == AddendMI->getOperand(0).getReg() && "Addend copy not tied to old FMA output!"); diff --git a/llvm/test/CodeGen/PowerPC/fma-mutate.ll b/llvm/test/CodeGen/PowerPC/fma-mutate.ll new file mode 100644 index 00000000000..1a391f4c230 --- /dev/null +++ b/llvm/test/CodeGen/PowerPC/fma-mutate.ll @@ -0,0 +1,21 @@ +; Test several VSX FMA mutation opportunities. The first one isn't a +; reasonable transformation because the killed product register is the +; same as the FMA target register. The second one is legal. The third +; one doesn't fit the feeding-copy pattern. + +; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 -enable-unsafe-fp-math -mattr=+vsx | FileCheck %s +target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64" +target triple = "powerpc64-unknown-linux-gnu" + +declare double @llvm.sqrt.f64(double) + +define double @foo3(double %a) nounwind { + %r = call double @llvm.sqrt.f64(double %a) + ret double %r + +; CHECK: @foo3 +; CHECK: xsnmsubadp [[REG:[0-9]+]], {{[0-9]+}}, [[REG]] +; CHECK: xsmaddmdp +; CHECK: xsmaddadp +} + diff --git a/llvm/test/CodeGen/PowerPC/recipest.ll b/llvm/test/CodeGen/PowerPC/recipest.ll index 2f6a3eca488..cd77548b281 100644 --- a/llvm/test/CodeGen/PowerPC/recipest.ll +++ b/llvm/test/CodeGen/PowerPC/recipest.ll @@ -1,5 +1,5 @@ -; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 -enable-unsafe-fp-math | FileCheck %s -; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 | FileCheck -check-prefix=CHECK-SAFE %s +; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 -enable-unsafe-fp-math -mattr=-vsx | FileCheck %s +; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 -mattr=-vsx | FileCheck -check-prefix=CHECK-SAFE %s target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64" target triple = "powerpc64-unknown-linux-gnu" |
