mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-04 05:17:07 +00:00
2afd045e03
Use a loop instruction with a constant extender for a hardware loop instruction that is too far away from the start of the loop. This is cheaper than changing the SA register value. Differential Revision: http://reviews.llvm.org/D9262 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235882 91177308-0d34-0410-b5e6-96231b3b80d8
37 lines
997 B
LLVM
37 lines
997 B
LLVM
; RUN: llc -march=hexagon -hexagon-loop-range=0 < %s | FileCheck %s
|
|
|
|
; Test that the loop start address operand uses a constant extender
|
|
; if the offset is out of range.
|
|
|
|
; CHECK: loop0(##.LBB
|
|
; CHECK: endloop0
|
|
|
|
@g = external global i32, align 4
|
|
|
|
define void @test(i32* nocapture %a, i32* nocapture readonly %b, i32 %n) #0 {
|
|
entry:
|
|
%cmp6 = icmp slt i32 %n, 1
|
|
br i1 %cmp6, label %for.end, label %for.body.preheader
|
|
|
|
for.body.preheader:
|
|
br label %for.body
|
|
|
|
for.body:
|
|
%i.07 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
|
|
%arrayidx = getelementptr inbounds i32, i32* %b, i32 %i.07
|
|
%0 = load i32, i32* %arrayidx, align 4
|
|
%1 = load i32, i32* @g, align 4
|
|
%mul = mul nsw i32 %1, %0
|
|
%arrayidx1 = getelementptr inbounds i32, i32* %a, i32 %i.07
|
|
store i32 %mul, i32* %arrayidx1, align 4
|
|
%inc = add nuw nsw i32 %i.07, 1
|
|
%exitcond = icmp eq i32 %inc, %n
|
|
br i1 %exitcond, label %for.end.loopexit, label %for.body
|
|
|
|
for.end.loopexit:
|
|
br label %for.end
|
|
|
|
for.end:
|
|
ret void
|
|
}
|