From 6ef40b11f8331b80d72e7e5f2670d8e0eb190bb2 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Thu, 16 Jul 2009 06:31:37 +0000 Subject: [PATCH] use SUBREG_TO_REG instead of INSERT_SUBREG, this way the code generator can know the top bits are zero, not undefined. Thanks to Dan for pointing this out. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75899 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/X86/X86Instr64bit.td | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/Target/X86/X86Instr64bit.td b/lib/Target/X86/X86Instr64bit.td index dd6f984144f..c4b25fca2fc 100644 --- a/lib/Target/X86/X86Instr64bit.td +++ b/lib/Target/X86/X86Instr64bit.td @@ -1309,7 +1309,7 @@ def Int_CVTTSS2SI64rm: RSSI<0x2C, MRMSrcMem, (outs GR64:$dst), (ins f32mem:$src) // when we have a better way to specify isel priority. let AddedComplexity = 1 in def : Pat<(i64 0), - (INSERT_SUBREG (i64 (IMPLICIT_DEF)), (MOV32r0), x86_subreg_32bit)>; + (SUBREG_TO_REG (i64 0), (MOV32r0), x86_subreg_32bit)>; // Materialize i64 constant where top 32-bits are zero. -- 2.34.1