llvm-6502/test/CodeGen/X86/full-lsr.ll
Dan Gohman 572645cf84 Reapply the new LoopStrengthReduction code, with compile time and
bug fixes, and with improved heuristics for analyzing foreign-loop
addrecs.

This change also flattens IVUsers, eliminating the stride-oriented
groupings, which makes it easier to work with.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95975 91177308-0d34-0410-b5e6-96231b3b80d8
2010-02-12 10:34:29 +00:00

35 lines
1.3 KiB
LLVM

; RUN: llc < %s -march=x86 >%t
; RUN: grep {addl \\\$4,} %t | count 3
; RUN: not grep {,%} %t
define void @foo(float* nocapture %A, float* nocapture %B, float* nocapture %C, i32 %N) nounwind {
entry:
%0 = icmp sgt i32 %N, 0 ; <i1> [#uses=1]
br i1 %0, label %bb, label %return
bb: ; preds = %bb, %entry
%i.03 = phi i32 [ 0, %entry ], [ %indvar.next, %bb ] ; <i32> [#uses=5]
%1 = getelementptr float* %A, i32 %i.03 ; <float*> [#uses=1]
%2 = load float* %1, align 4 ; <float> [#uses=1]
%3 = getelementptr float* %B, i32 %i.03 ; <float*> [#uses=1]
%4 = load float* %3, align 4 ; <float> [#uses=1]
%5 = fadd float %2, %4 ; <float> [#uses=1]
%6 = getelementptr float* %C, i32 %i.03 ; <float*> [#uses=1]
store float %5, float* %6, align 4
%7 = add i32 %i.03, 10 ; <i32> [#uses=3]
%8 = getelementptr float* %A, i32 %7 ; <float*> [#uses=1]
%9 = load float* %8, align 4 ; <float> [#uses=1]
%10 = getelementptr float* %B, i32 %7 ; <float*> [#uses=1]
%11 = load float* %10, align 4 ; <float> [#uses=1]
%12 = fadd float %9, %11 ; <float> [#uses=1]
%13 = getelementptr float* %C, i32 %7 ; <float*> [#uses=1]
store float %12, float* %13, align 4
%indvar.next = add i32 %i.03, 1 ; <i32> [#uses=2]
%exitcond = icmp eq i32 %indvar.next, %N ; <i1> [#uses=1]
br i1 %exitcond, label %return, label %bb
return: ; preds = %bb, %entry
ret void
}