mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-14 11:32:34 +00:00
2e4cd27799
Patch by Dave Estes<cestes@codeaurora.org> Differential Revision: http://reviews.llvm.org/D4008 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210705 91177308-0d34-0410-b5e6-96231b3b80d8
113 lines
3.9 KiB
LLVM
113 lines
3.9 KiB
LLVM
; REQUIRES: asserts
|
|
;
|
|
; The Cortext-A57 machine model will avoid scheduling load instructions in
|
|
; succession because loads on the A57 have a latency of 4 cycles and they all
|
|
; issue to the same pipeline. Instead, it will move other instructions between
|
|
; the loads to avoid unnecessary stalls. The generic machine model schedules 4
|
|
; loads consecutively for this case and will cause stalls.
|
|
;
|
|
; RUN: llc < %s -mtriple=arm64-linux-gnu -mcpu=cortex-a57 -enable-misched -verify-misched -debug-only=misched -o - 2>&1 > /dev/null | FileCheck %s
|
|
; CHECK: ********** MI Scheduling **********
|
|
; CHECK: main:BB#2
|
|
; CHECK LDR
|
|
; CHECK Latency : 4
|
|
; CHECK: *** Final schedule for BB#2 ***
|
|
; CHECK: LDR
|
|
; CHECK: LDR
|
|
; CHECK-NOT: LDR
|
|
; CHECK: {{.*}}
|
|
; CHECK: ********** MI Scheduling **********
|
|
|
|
@main.x = private unnamed_addr constant [8 x i32] [i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1, i32 1], align 4
|
|
@main.y = private unnamed_addr constant [8 x i32] [i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2, i32 2], align 4
|
|
|
|
; Function Attrs: nounwind
|
|
define i32 @main() #0 {
|
|
entry:
|
|
%retval = alloca i32, align 4
|
|
%x = alloca [8 x i32], align 4
|
|
%y = alloca [8 x i32], align 4
|
|
%i = alloca i32, align 4
|
|
%xx = alloca i32, align 4
|
|
%yy = alloca i32, align 4
|
|
store i32 0, i32* %retval
|
|
%0 = bitcast [8 x i32]* %x to i8*
|
|
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* bitcast ([8 x i32]* @main.x to i8*), i64 32, i32 4, i1 false)
|
|
%1 = bitcast [8 x i32]* %y to i8*
|
|
call void @llvm.memcpy.p0i8.p0i8.i64(i8* %1, i8* bitcast ([8 x i32]* @main.y to i8*), i64 32, i32 4, i1 false)
|
|
store i32 0, i32* %xx, align 4
|
|
store i32 0, i32* %yy, align 4
|
|
store i32 0, i32* %i, align 4
|
|
br label %for.cond
|
|
|
|
for.cond: ; preds = %for.inc, %entry
|
|
%2 = load i32* %i, align 4
|
|
%cmp = icmp slt i32 %2, 8
|
|
br i1 %cmp, label %for.body, label %for.end
|
|
|
|
for.body: ; preds = %for.cond
|
|
%3 = load i32* %yy, align 4
|
|
%4 = load i32* %i, align 4
|
|
%idxprom = sext i32 %4 to i64
|
|
%arrayidx = getelementptr inbounds [8 x i32]* %x, i32 0, i64 %idxprom
|
|
%5 = load i32* %arrayidx, align 4
|
|
%add = add nsw i32 %5, 1
|
|
store i32 %add, i32* %xx, align 4
|
|
%6 = load i32* %xx, align 4
|
|
%add1 = add nsw i32 %6, 12
|
|
store i32 %add1, i32* %xx, align 4
|
|
%7 = load i32* %xx, align 4
|
|
%add2 = add nsw i32 %7, 23
|
|
store i32 %add2, i32* %xx, align 4
|
|
%8 = load i32* %xx, align 4
|
|
%add3 = add nsw i32 %8, 34
|
|
store i32 %add3, i32* %xx, align 4
|
|
%9 = load i32* %i, align 4
|
|
%idxprom4 = sext i32 %9 to i64
|
|
%arrayidx5 = getelementptr inbounds [8 x i32]* %y, i32 0, i64 %idxprom4
|
|
%10 = load i32* %arrayidx5, align 4
|
|
|
|
%add4 = add nsw i32 %9, %add
|
|
%add5 = add nsw i32 %10, %add1
|
|
%add6 = add nsw i32 %add4, %add5
|
|
|
|
%add7 = add nsw i32 %9, %add3
|
|
%add8 = add nsw i32 %10, %add4
|
|
%add9 = add nsw i32 %add7, %add8
|
|
|
|
%add10 = add nsw i32 %9, %add6
|
|
%add11 = add nsw i32 %10, %add7
|
|
%add12 = add nsw i32 %add10, %add11
|
|
|
|
%add13 = add nsw i32 %9, %add9
|
|
%add14 = add nsw i32 %10, %add10
|
|
%add15 = add nsw i32 %add13, %add14
|
|
|
|
store i32 %add15, i32* %xx, align 4
|
|
|
|
%div = sdiv i32 %4, %5
|
|
|
|
store i32 %div, i32* %yy, align 4
|
|
|
|
br label %for.inc
|
|
|
|
for.inc: ; preds = %for.body
|
|
%11 = load i32* %i, align 4
|
|
%inc = add nsw i32 %11, 1
|
|
store i32 %inc, i32* %i, align 4
|
|
br label %for.cond
|
|
|
|
for.end: ; preds = %for.cond
|
|
%12 = load i32* %xx, align 4
|
|
%13 = load i32* %yy, align 4
|
|
%add67 = add nsw i32 %12, %13
|
|
ret i32 %add67
|
|
}
|
|
|
|
|
|
; Function Attrs: nounwind
|
|
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i32, i1) #1
|
|
|
|
attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
|
|
attributes #1 = { nounwind }
|