llvm-6502/test/Transforms/InstCombine/fpextend.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

37 lines
1.2 KiB
LLVM

; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep fpext
@X = external global float
@Y = external global float
define void @test() nounwind {
entry:
%tmp = load float* @X, align 4 ; <float> [#uses=1]
%tmp1 = fpext float %tmp to double ; <double> [#uses=1]
%tmp3 = fadd double %tmp1, 0.000000e+00 ; <double> [#uses=1]
%tmp34 = fptrunc double %tmp3 to float ; <float> [#uses=1]
store float %tmp34, float* @X, align 4
ret void
}
define void @test3() nounwind {
entry:
%tmp = load float* @X, align 4 ; <float> [#uses=1]
%tmp1 = fpext float %tmp to double ; <double> [#uses=1]
%tmp2 = load float* @Y, align 4 ; <float> [#uses=1]
%tmp23 = fpext float %tmp2 to double ; <double> [#uses=1]
%tmp5 = fdiv double %tmp1, %tmp23 ; <double> [#uses=1]
%tmp56 = fptrunc double %tmp5 to float ; <float> [#uses=1]
store float %tmp56, float* @X, align 4
ret void
}
define void @test4() nounwind {
entry:
%tmp = load float* @X, align 4 ; <float> [#uses=1]
%tmp1 = fpext float %tmp to double ; <double> [#uses=1]
%tmp2 = fsub double -0.000000e+00, %tmp1 ; <double> [#uses=1]
%tmp34 = fptrunc double %tmp2 to float ; <float> [#uses=1]
store float %tmp34, float* @X, align 4
ret void
}