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Pull in r198280 from upstream llvm trunk (by Venkatraman Govindaraju):
[SparcV9]: Use SRL instead of SLL to clear top 32-bits in ctpop:i32. SLL does not clear top 32 bit, only SRL does.
Introduced here: http://svnweb.freebsd.org/changeset/base/262261
Index: lib/Target/Sparc/SparcInstrInfo.td
===================================================================
--- lib/Target/Sparc/SparcInstrInfo.td
+++ lib/Target/Sparc/SparcInstrInfo.td
@@ -967,13 +967,13 @@ let Predicates = [HasV9] in {
}
// POPCrr - This does a ctpop of a 64-bit register. As such, we have to clear
-// the top 32-bits before using it. To do this clearing, we use a SLLri X,0.
+// the top 32-bits before using it. To do this clearing, we use a SRLri X,0.
let rs1 = 0 in
def POPCrr : F3_1<2, 0b101110,
(outs IntRegs:$dst), (ins IntRegs:$src),
"popc $src, $dst", []>, Requires<[HasV9]>;
def : Pat<(ctpop i32:$src),
- (POPCrr (SLLri $src, 0))>;
+ (POPCrr (SRLri $src, 0))>;
//===----------------------------------------------------------------------===//
// Non-Instruction Patterns
Index: test/CodeGen/SPARC/ctpop.ll
===================================================================
--- test/CodeGen/SPARC/ctpop.ll
+++ test/CodeGen/SPARC/ctpop.ll
@@ -1,8 +1,22 @@
-; RUN: llc < %s -march=sparc -mattr=-v9 | not grep popc
-; RUN: llc < %s -march=sparc -mattr=+v9 | grep popc
+; RUN: llc < %s -march=sparc -mattr=-v9 | FileCheck %s -check-prefix=V8
+; RUN: llc < %s -march=sparc -mattr=+v9 | FileCheck %s -check-prefix=V9
+; RUN: llc < %s -march=sparcv9 | FileCheck %s -check-prefix=SPARC64
declare i32 @llvm.ctpop.i32(i32)
+; V8-LABEL: test
+; V8-NOT : popc
+
+; V9-LABEL: test
+; V9: srl %o0, 0, %o0
+; V9-NEXT: jmp %o7+8
+; V9-NEXT: popc %o0, %o0
+
+; SPARC64-LABEL: test
+; SPARC64: srl %o0, 0, %o0
+; SPARC64: jmp %o7+8
+; SPARC64: popc %o0, %o0
+
define i32 @test(i32 %X) {
%Y = call i32 @llvm.ctpop.i32( i32 %X ) ; <i32> [#uses=1]
ret i32 %Y
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