llvm-6502/test/CodeGen/X86/coalescer-commute2.ll
Dan Gohman ae3a0be92e Split the Add, Sub, and Mul instruction opcodes into separate
integer and floating-point opcodes, introducing
FAdd, FSub, and FMul.

For now, the AsmParser, BitcodeReader, and IRBuilder all preserve
backwards compatability, and the Core LLVM APIs preserve backwards
compatibility for IR producers. Most front-ends won't need to change
immediately.

This implements the first step of the plan outlined here:
http://nondot.org/sabre/LLVMNotes/IntegerOverflow.txt


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72897 91177308-0d34-0410-b5e6-96231b3b80d8
2009-06-04 22:49:04 +00:00

35 lines
1.3 KiB
LLVM

; RUN: llvm-as < %s | llc -march=x86-64 | grep paddw | count 2
; RUN: llvm-as < %s | llc -march=x86-64 | not grep mov
; The 2-addr pass should ensure that identical code is produced for these functions
; no extra copy should be generated.
define <2 x i64> @test1(<2 x i64> %x, <2 x i64> %y) nounwind {
entry:
%tmp6 = bitcast <2 x i64> %y to <8 x i16> ; <<8 x i16>> [#uses=1]
%tmp8 = bitcast <2 x i64> %x to <8 x i16> ; <<8 x i16>> [#uses=1]
%tmp9 = add <8 x i16> %tmp8, %tmp6 ; <<8 x i16>> [#uses=1]
%tmp10 = bitcast <8 x i16> %tmp9 to <2 x i64> ; <<2 x i64>> [#uses=1]
ret <2 x i64> %tmp10
}
define <2 x i64> @test2(<2 x i64> %x, <2 x i64> %y) nounwind {
entry:
%tmp6 = bitcast <2 x i64> %x to <8 x i16> ; <<8 x i16>> [#uses=1]
%tmp8 = bitcast <2 x i64> %y to <8 x i16> ; <<8 x i16>> [#uses=1]
%tmp9 = add <8 x i16> %tmp8, %tmp6 ; <<8 x i16>> [#uses=1]
%tmp10 = bitcast <8 x i16> %tmp9 to <2 x i64> ; <<2 x i64>> [#uses=1]
ret <2 x i64> %tmp10
}
; The coalescer should commute the add to avoid a copy.
define <4 x float> @test3(<4 x float> %V) {
entry:
%tmp8 = shufflevector <4 x float> %V, <4 x float> undef,
<4 x i32> < i32 3, i32 2, i32 1, i32 0 >
%add = fadd <4 x float> %tmp8, %V
ret <4 x float> %add
}