44 lines
1.7 KiB
LLVM
44 lines
1.7 KiB
LLVM
|
; RUN: opt < %s -loop-reduce -S | FileCheck %s
|
||
|
|
|
||
|
|
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
|
||
|
|
target triple = "thumbv7m-arm-none-eabi"
|
||
|
|
|
||
|
|
; Check that the IV updates (incdec.ptr{,1,2}) are kept in the latch block
|
||
|
|
; and not moved to the header/exiting block. Inserting them in the header
|
||
|
|
; doubles register pressure and adds moves.
|
||
|
|
|
||
|
|
; CHECK-LABEL: @f
|
||
|
|
; CHECK: while.cond:
|
||
|
|
; CHECK: icmp sgt i32 %n.addr.0, 0
|
||
|
|
; CHECK: while.body:
|
||
|
|
; CHECK: incdec.ptr =
|
||
|
|
; CHECK: incdec.ptr1 =
|
||
|
|
; CHECK: incdec.ptr2 =
|
||
|
|
; CHECK: dec =
|
||
|
|
define void @f(float* nocapture readonly %a, float* nocapture readonly %b, float* nocapture %c, i32 %n) {
|
||
|
|
entry:
|
||
|
|
br label %while.cond
|
||
|
|
|
||
|
|
while.cond: ; preds = %while.body, %entry
|
||
|
|
%a.addr.0 = phi float* [ %a, %entry ], [ %incdec.ptr, %while.body ]
|
||
|
|
%b.addr.0 = phi float* [ %b, %entry ], [ %incdec.ptr1, %while.body ]
|
||
|
|
%c.addr.0 = phi float* [ %c, %entry ], [ %incdec.ptr2, %while.body ]
|
||
|
|
%n.addr.0 = phi i32 [ %n, %entry ], [ %dec, %while.body ]
|
||
|
|
%cmp = icmp sgt i32 %n.addr.0, 0
|
||
|
|
br i1 %cmp, label %while.body, label %while.end
|
||
|
|
|
||
|
|
while.body: ; preds = %while.cond
|
||
|
|
%incdec.ptr = getelementptr inbounds float, float* %a.addr.0, i32 1
|
||
|
|
%tmp = load float, float* %a.addr.0, align 4
|
||
|
|
%incdec.ptr1 = getelementptr inbounds float, float* %b.addr.0, i32 1
|
||
|
|
%tmp1 = load float, float* %b.addr.0, align 4
|
||
|
|
%add = fadd float %tmp, %tmp1
|
||
|
|
%incdec.ptr2 = getelementptr inbounds float, float* %c.addr.0, i32 1
|
||
|
|
store float %add, float* %c.addr.0, align 4
|
||
|
|
%dec = add nsw i32 %n.addr.0, -1
|
||
|
|
br label %while.cond
|
||
|
|
|
||
|
|
while.end: ; preds = %while.cond
|
||
|
|
ret void
|
||
|
|
}
|