llvm-6502/test/Transforms/InstCombine/shift-trunc-shift.ll

; RUN: opt < %s -instcombine -S | grep lshr.*63

define i32 @t1(i64 %d18) {
entry:
	%tmp916 = lshr i64 %d18, 32		; <i64> [#uses=1]
	%tmp917 = trunc i64 %tmp916 to i32		; <i32> [#uses=1]
	%tmp10 = lshr i32 %tmp917, 31		; <i32> [#uses=1]
	ret i32 %tmp10
}
Change tests from "opt %s" to "opt < %s" so that opt doesn't see the input filename so that opt doesn't print the input filename in the output so that grep lines in the tests don't unintentionally match strings in the input filename. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81537 91177308-0d34-0410-b5e6-96231b3b80d8 2009-09-11 18:01:28 +00:00			`; RUN: opt < %s -instcombine -S \| grep lshr.*63`
implement InstCombine/shift-trunc-shift.ll. This allows us to compile: #include <math.h> int t1(double d) { return signbit(d); } into: _t1: movd %xmm0, %rax shrq $63, %rax ret instead of: _t1: movd %xmm0, %rax shrq $32, %rax shrl $31, %eax ret on x86-64. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45311 91177308-0d34-0410-b5e6-96231b3b80d8 2007-12-22 09:07:47 +00:00
			`define i32 @t1(i64 %d18) {`
			`entry:`
			`%tmp916 = lshr i64 %d18, 32 ; <i64> [#uses=1]`
			`%tmp917 = trunc i64 %tmp916 to i32 ; <i32> [#uses=1]`
			`%tmp10 = lshr i32 %tmp917, 31 ; <i32> [#uses=1]`
			`ret i32 %tmp10`
			`}`