mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-10 22:55:57 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143145 91177308-0d34-0410-b5e6-96231b3b80d8
51 lines
1.7 KiB
LLVM
51 lines
1.7 KiB
LLVM
; RUN: llc < %s -mtriple=thumbv7-apple-darwin -mcpu=cortex-a9 | FileCheck %s
|
|
; Avoid some 's' 16-bit instruction which partially update CPSR (and add false
|
|
; dependency) when it isn't dependent on last CPSR defining instruction.
|
|
; rdar://8928208
|
|
|
|
define i32 @t1(i32 %a, i32 %b, i32 %c, i32 %d) nounwind readnone {
|
|
entry:
|
|
; CHECK: t1:
|
|
; CHECK: muls [[REG:(r[0-9]+)]], r2, r3
|
|
; CHECK-NEXT: mul [[REG2:(r[0-9]+)]], r0, r1
|
|
; CHECK-NEXT: muls r0, [[REG2]], [[REG]]
|
|
%0 = mul nsw i32 %a, %b
|
|
%1 = mul nsw i32 %c, %d
|
|
%2 = mul nsw i32 %0, %1
|
|
ret i32 %2
|
|
}
|
|
|
|
; Avoid partial CPSR dependency via loop backedge.
|
|
; rdar://10357570
|
|
define void @t2(i32* nocapture %ptr1, i32* %ptr2, i32 %c) nounwind {
|
|
entry:
|
|
; CHECK: t2:
|
|
%tobool7 = icmp eq i32* %ptr2, null
|
|
br i1 %tobool7, label %while.end, label %while.body
|
|
|
|
while.body:
|
|
; CHECK: while.body
|
|
; CHECK: mul r{{[0-9]+}}
|
|
; CHECK-NOT: muls
|
|
%ptr1.addr.09 = phi i32* [ %add.ptr, %while.body ], [ %ptr1, %entry ]
|
|
%ptr2.addr.08 = phi i32* [ %incdec.ptr, %while.body ], [ %ptr2, %entry ]
|
|
%0 = load i32* %ptr1.addr.09, align 4
|
|
%arrayidx1 = getelementptr inbounds i32* %ptr1.addr.09, i32 1
|
|
%1 = load i32* %arrayidx1, align 4
|
|
%arrayidx3 = getelementptr inbounds i32* %ptr1.addr.09, i32 2
|
|
%2 = load i32* %arrayidx3, align 4
|
|
%arrayidx4 = getelementptr inbounds i32* %ptr1.addr.09, i32 3
|
|
%3 = load i32* %arrayidx4, align 4
|
|
%add.ptr = getelementptr inbounds i32* %ptr1.addr.09, i32 4
|
|
%mul = mul i32 %1, %0
|
|
%mul5 = mul i32 %mul, %2
|
|
%mul6 = mul i32 %mul5, %3
|
|
store i32 %mul6, i32* %ptr2.addr.08, align 4
|
|
%incdec.ptr = getelementptr inbounds i32* %ptr2.addr.08, i32 -1
|
|
%tobool = icmp eq i32* %incdec.ptr, null
|
|
br i1 %tobool, label %while.end, label %while.body
|
|
|
|
while.end:
|
|
ret void
|
|
}
|