LFS/STFS load and store FP values, not integer ones. This change allows us

to codegen this: float foo() { return 1.245; }

into this:

_foo:
        lis r2, ha16(.CPI_foo_0)
        lfs f1, lo16(.CPI_foo_0)(r2)
        blr

instead of this:

_foo:
        lis r2, ha16(.CPI_foo_0)
        lfs r2, lo16(.CPI_foo_0)(r2)   <-- ouch
        or f1, r2, r2                  <-- ouch
        blr

with the dag isel.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23033 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/PowerPC/PPCInstrInfo.td b/lib/Target/PowerPC/PPCInstrInfo.td
index b0a8b3b9ee7f07dd9f58c28f3cf1de58dbcda6ab..cfcc2fcac71e2cc7b04f06424019968b8038d7b9 100644 (file)
--- a/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/lib/Target/PowerPC/PPCInstrInfo.td
@@ -179,15 +179,15 @@ def CMPLWI : DForm_6_ext<10, (ops CRRC:$dst, GPRC:$src1, u16imm:$src2),
 def CMPLDI : DForm_6_ext<10, (ops CRRC:$dst, GPRC:$src1, u16imm:$src2),
                          "cmpldi $dst, $src1, $src2">, isPPC64;
 let isLoad = 1 in {
-def LFS : DForm_8<48, (ops GPRC:$rD, symbolLo:$disp, GPRC:$rA),
+def LFS : DForm_8<48, (ops FPRC:$rD, symbolLo:$disp, GPRC:$rA),
                   "lfs $rD, $disp($rA)">;
-def LFD : DForm_8<50, (ops GPRC:$rD, symbolLo:$disp, GPRC:$rA),
+def LFD : DForm_8<50, (ops FPRC:$rD, symbolLo:$disp, GPRC:$rA),
                   "lfd $rD, $disp($rA)">;
 }
 let isStore = 1 in {
-def STFS : DForm_9<52, (ops GPRC:$rS, symbolLo:$disp, GPRC:$rA),
+def STFS : DForm_9<52, (ops FPRC:$rS, symbolLo:$disp, GPRC:$rA),
                    "stfs $rS, $disp($rA)">;
-def STFD : DForm_9<54, (ops GPRC:$rS, symbolLo:$disp, GPRC:$rA),
+def STFD : DForm_9<54, (ops FPRC:$rS, symbolLo:$disp, GPRC:$rA),
                    "stfd $rS, $disp($rA)">;
 }