Author: djg Date: Mon Sep 17 09:35:24 2007 New Revision: 42024 URL: http://llvm.org/viewvc/llvm-project?rev=42024&view=rev Log: Use "test reg,reg" in place of "cmp reg,0" for 64-bit operands. This was previously only done for 32-bit and smaller operands.
Added: llvm/trunk/test/CodeGen/X86/cmp0.ll Modified: llvm/trunk/lib/Target/X86/X86InstrX86-64.td Modified: llvm/trunk/lib/Target/X86/X86InstrX86-64.td URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86InstrX86-64.td?rev=42024&r1=42023&r2=42024&view=diff ============================================================================== --- llvm/trunk/lib/Target/X86/X86InstrX86-64.td (original) +++ llvm/trunk/lib/Target/X86/X86InstrX86-64.td Mon Sep 17 09:35:24 2007 @@ -1076,6 +1076,12 @@ def : Pat<(X86tailcall GR64:$dst), (CALL64r GR64:$dst)>; +// Comparisons. + +// TEST R,R is smaller than CMP R,0 +def : Pat<(X86cmp GR64:$src1, 0), + (TEST64rr GR64:$src1, GR64:$src1)>; + // {s|z}extload bool -> {s|z}extload byte def : Pat<(sextloadi64i1 addr:$src), (MOVSX64rm8 addr:$src)>; def : Pat<(zextloadi64i1 addr:$src), (MOVZX64rm8 addr:$src)>; Added: llvm/trunk/test/CodeGen/X86/cmp0.ll URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/cmp0.ll?rev=42024&view=auto ============================================================================== --- llvm/trunk/test/CodeGen/X86/cmp0.ll (added) +++ llvm/trunk/test/CodeGen/X86/cmp0.ll Mon Sep 17 09:35:24 2007 @@ -0,0 +1,7 @@ +; RUN: llvm-as < %s | llc -march=x86-64 | grep -v cmp + +define i64 @foo(i64 %x) { + %t = icmp eq i64 %x, 0 + %r = zext i1 %t to i64 + ret i64 %r +} _______________________________________________ llvm-commits mailing list llvm-commits@cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits