mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-15 20:06:46 +00:00
db080e814f
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148107 91177308-0d34-0410-b5e6-96231b3b80d8
97 lines
3.8 KiB
LLVM
97 lines
3.8 KiB
LLVM
; RUN: llc < %s -mtriple=armv7-apple-ios -mcpu=cortex-a9 -stress-ivchain | FileCheck %s
|
|
; REQUIRES: asserts
|
|
|
|
; @sharedidx is an unrolled variant of this loop:
|
|
; for (unsigned long i = 0; i < len; i += s) {
|
|
; c[i] = a[i] + b[i];
|
|
; }
|
|
; where 's' cannot be folded into the addressing mode.
|
|
;
|
|
; This is not quite profitable to chain. But with -stress-ivchain, we
|
|
; can form three address chains in place of the shared induction
|
|
; variable.
|
|
|
|
; rdar://10674430
|
|
define void @sharedidx(i8* nocapture %a, i8* nocapture %b, i8* nocapture %c, i32 %s, i32 %len) nounwind ssp {
|
|
entry:
|
|
; CHECK: sharedidx:
|
|
%cmp8 = icmp eq i32 %len, 0
|
|
br i1 %cmp8, label %for.end, label %for.body
|
|
|
|
for.body: ; preds = %entry, %for.body.3
|
|
; CHECK: %for.body
|
|
; CHECK: ldrb {{r[0-9]|lr}}, [{{r[0-9]|lr}}, {{r[0-9]|lr}}]!
|
|
; CHECK: ldrb {{r[0-9]|lr}}, [{{r[0-9]|lr}}, {{r[0-9]|lr}}]!
|
|
%i.09 = phi i32 [ %add5.3, %for.body.3 ], [ 0, %entry ]
|
|
%arrayidx = getelementptr inbounds i8* %a, i32 %i.09
|
|
%0 = load i8* %arrayidx, align 1
|
|
%conv6 = zext i8 %0 to i32
|
|
%arrayidx1 = getelementptr inbounds i8* %b, i32 %i.09
|
|
%1 = load i8* %arrayidx1, align 1
|
|
%conv27 = zext i8 %1 to i32
|
|
%add = add nsw i32 %conv27, %conv6
|
|
%conv3 = trunc i32 %add to i8
|
|
%arrayidx4 = getelementptr inbounds i8* %c, i32 %i.09
|
|
store i8 %conv3, i8* %arrayidx4, align 1
|
|
%add5 = add i32 %i.09, %s
|
|
%cmp = icmp ult i32 %add5, %len
|
|
br i1 %cmp, label %for.body.1, label %for.end
|
|
|
|
for.end: ; preds = %for.body, %for.body.1, %for.body.2, %for.body.3, %entry
|
|
ret void
|
|
|
|
for.body.1: ; preds = %for.body
|
|
; CHECK: %for.body.1
|
|
; CHECK: ldrb {{r[0-9]|lr}}, [{{r[0-9]|lr}}, {{r[0-9]|lr}}]!
|
|
; CHECK: ldrb {{r[0-9]|lr}}, [{{r[0-9]|lr}}, {{r[0-9]|lr}}]!
|
|
%arrayidx.1 = getelementptr inbounds i8* %a, i32 %add5
|
|
%2 = load i8* %arrayidx.1, align 1
|
|
%conv6.1 = zext i8 %2 to i32
|
|
%arrayidx1.1 = getelementptr inbounds i8* %b, i32 %add5
|
|
%3 = load i8* %arrayidx1.1, align 1
|
|
%conv27.1 = zext i8 %3 to i32
|
|
%add.1 = add nsw i32 %conv27.1, %conv6.1
|
|
%conv3.1 = trunc i32 %add.1 to i8
|
|
%arrayidx4.1 = getelementptr inbounds i8* %c, i32 %add5
|
|
store i8 %conv3.1, i8* %arrayidx4.1, align 1
|
|
%add5.1 = add i32 %add5, %s
|
|
%cmp.1 = icmp ult i32 %add5.1, %len
|
|
br i1 %cmp.1, label %for.body.2, label %for.end
|
|
|
|
for.body.2: ; preds = %for.body.1
|
|
; CHECK: %for.body.2
|
|
; CHECK: ldrb {{r[0-9]|lr}}, [{{r[0-9]|lr}}, {{r[0-9]|lr}}]!
|
|
; CHECK: ldrb {{r[0-9]|lr}}, [{{r[0-9]|lr}}, {{r[0-9]|lr}}]!
|
|
%arrayidx.2 = getelementptr inbounds i8* %a, i32 %add5.1
|
|
%4 = load i8* %arrayidx.2, align 1
|
|
%conv6.2 = zext i8 %4 to i32
|
|
%arrayidx1.2 = getelementptr inbounds i8* %b, i32 %add5.1
|
|
%5 = load i8* %arrayidx1.2, align 1
|
|
%conv27.2 = zext i8 %5 to i32
|
|
%add.2 = add nsw i32 %conv27.2, %conv6.2
|
|
%conv3.2 = trunc i32 %add.2 to i8
|
|
%arrayidx4.2 = getelementptr inbounds i8* %c, i32 %add5.1
|
|
store i8 %conv3.2, i8* %arrayidx4.2, align 1
|
|
%add5.2 = add i32 %add5.1, %s
|
|
%cmp.2 = icmp ult i32 %add5.2, %len
|
|
br i1 %cmp.2, label %for.body.3, label %for.end
|
|
|
|
for.body.3: ; preds = %for.body.2
|
|
; CHECK: %for.body.3
|
|
; CHECK: ldrb {{r[0-9]|lr}}, [{{r[0-9]|lr}}, {{r[0-9]|lr}}]!
|
|
; CHECK: ldrb {{r[0-9]|lr}}, [{{r[0-9]|lr}}, {{r[0-9]|lr}}]!
|
|
%arrayidx.3 = getelementptr inbounds i8* %a, i32 %add5.2
|
|
%6 = load i8* %arrayidx.3, align 1
|
|
%conv6.3 = zext i8 %6 to i32
|
|
%arrayidx1.3 = getelementptr inbounds i8* %b, i32 %add5.2
|
|
%7 = load i8* %arrayidx1.3, align 1
|
|
%conv27.3 = zext i8 %7 to i32
|
|
%add.3 = add nsw i32 %conv27.3, %conv6.3
|
|
%conv3.3 = trunc i32 %add.3 to i8
|
|
%arrayidx4.3 = getelementptr inbounds i8* %c, i32 %add5.2
|
|
store i8 %conv3.3, i8* %arrayidx4.3, align 1
|
|
%add5.3 = add i32 %add5.2, %s
|
|
%cmp.3 = icmp ult i32 %add5.3, %len
|
|
br i1 %cmp.3, label %for.body, label %for.end
|
|
}
|