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llvm-6502/test/CodeGen/X86/2005-05-08-FPStackifierPHI.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

39 lines
1.9 KiB
LLVM

; RUN: llvm-as < %s | llc -march=x86 -mcpu=generic
; Make sure LLC doesn't crash in the stackifier due to FP PHI nodes.
define void @radfg_() {
entry:
br i1 false, label %no_exit.16.preheader, label %loopentry.0
loopentry.0: ; preds = %entry
ret void
no_exit.16.preheader: ; preds = %entry
br label %no_exit.16
no_exit.16: ; preds = %no_exit.16, %no_exit.16.preheader
br i1 false, label %loopexit.16.loopexit, label %no_exit.16
loopexit.16.loopexit: ; preds = %no_exit.16
br label %no_exit.18
no_exit.18: ; preds = %loopexit.20, %loopexit.16.loopexit
%tmp.882 = fadd float 0.000000e+00, 0.000000e+00 ; <float> [#uses=2]
br i1 false, label %loopexit.19, label %no_exit.19.preheader
no_exit.19.preheader: ; preds = %no_exit.18
ret void
loopexit.19: ; preds = %no_exit.18
br i1 false, label %loopexit.20, label %no_exit.20
no_exit.20: ; preds = %loopexit.21, %loopexit.19
%ai2.1122.tmp.3 = phi float [ %tmp.958, %loopexit.21 ], [ %tmp.882, %loopexit.19 ] ; <float> [#uses=1]
%tmp.950 = fmul float %tmp.882, %ai2.1122.tmp.3 ; <float> [#uses=1]
%tmp.951 = fsub float 0.000000e+00, %tmp.950 ; <float> [#uses=1]
%tmp.958 = fadd float 0.000000e+00, 0.000000e+00 ; <float> [#uses=1]
br i1 false, label %loopexit.21, label %no_exit.21.preheader
no_exit.21.preheader: ; preds = %no_exit.20
ret void
loopexit.21: ; preds = %no_exit.20
br i1 false, label %loopexit.20, label %no_exit.20
loopexit.20: ; preds = %loopexit.21, %loopexit.19
%ar2.1124.tmp.2 = phi float [ 0.000000e+00, %loopexit.19 ], [ %tmp.951, %loopexit.21 ] ; <float> [#uses=0]
br i1 false, label %loopexit.18.loopexit, label %no_exit.18
loopexit.18.loopexit: ; preds = %loopexit.20
ret void
}