[NaryReassoc] reassociate GEP for CSE

[oota-llvm.git] / test / CodeGen / ARM / avoid-cpsr-rmw.ll

diff --git a/test/CodeGen/ARM/avoid-cpsr-rmw.ll b/test/CodeGen/ARM/avoid-cpsr-rmw.ll
index d148bbe41f2f3203b875971098f7869177fb030f..c3de07e03b6b31b73beca190d96c66a76ce36a97 100644 (file)
--- a/test/CodeGen/ARM/avoid-cpsr-rmw.ll
+++ b/test/CodeGen/ARM/avoid-cpsr-rmw.ll
@@ -1,16 +1,116 @@
 ; RUN: llc < %s -mtriple=thumbv7-apple-darwin -mcpu=cortex-a9 | FileCheck %s
+; RUN: llc < %s -mtriple=thumbv7-apple-darwin -mcpu=swift     | 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 @t(i32 %a, i32 %b, i32 %c, i32 %d) nounwind readnone {
+define i32 @t1(i32 %a, i32 %b, i32 %c, i32 %d) nounwind readnone {
  entry:
-; CHECK: t:
-; CHECK: muls r2, r2, r3
-; CHECK-NEXT: mul  r0, r0, r1
-; CHECK-NEXT: muls r0, r0, r2
+; CHECK-LABEL: t1:
+; CHECK: muls [[REG:(r[0-9]+)]], r3, r2
+; CHECK-NEXT: mul  [[REG2:(r[0-9]+)]], r1, r0
+; CHECK-NEXT: muls r0, [[REG]], [[REG2]]
   %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-LABEL: 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, i32* %ptr1.addr.09, align 4
+  %arrayidx1 = getelementptr inbounds i32, i32* %ptr1.addr.09, i32 1
+  %1 = load i32, i32* %arrayidx1, align 4
+  %arrayidx3 = getelementptr inbounds i32, i32* %ptr1.addr.09, i32 2
+  %2 = load i32, i32* %arrayidx3, align 4
+  %arrayidx4 = getelementptr inbounds i32, i32* %ptr1.addr.09, i32 3
+  %3 = load i32, i32* %arrayidx4, align 4
+  %add.ptr = getelementptr inbounds i32, 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, 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
+}
+
+; Allow partial CPSR dependency when code size is the priority.
+; rdar://12878928
+define void @t3(i32* nocapture %ptr1, i32* %ptr2, i32 %c) nounwind minsize {
+entry:
+; CHECK-LABEL: t3:
+  %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: 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, i32* %ptr1.addr.09, align 4
+  %arrayidx1 = getelementptr inbounds i32, i32* %ptr1.addr.09, i32 1
+  %1 = load i32, i32* %arrayidx1, align 4
+  %arrayidx3 = getelementptr inbounds i32, i32* %ptr1.addr.09, i32 2
+  %2 = load i32, i32* %arrayidx3, align 4
+  %arrayidx4 = getelementptr inbounds i32, i32* %ptr1.addr.09, i32 3
+  %3 = load i32, i32* %arrayidx4, align 4
+  %add.ptr = getelementptr inbounds i32, 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, 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
+}
+
+; Avoid producing tMOVi8 after a high-latency flag-setting operation.
+; <rdar://problem/13468102>
+define void @t4(i32* nocapture %p, double* nocapture %q) {
+entry:
+; CHECK: t4
+; CHECK: vmrs APSR_nzcv, fpscr
+; CHECK: if.then
+; CHECK-NOT: movs
+  %0 = load double, double* %q, align 4
+  %cmp = fcmp olt double %0, 1.000000e+01
+  %incdec.ptr1 = getelementptr inbounds i32, i32* %p, i32 1
+  br i1 %cmp, label %if.then, label %if.else
+
+if.then:
+  store i32 7, i32* %p, align 4
+  %incdec.ptr2 = getelementptr inbounds i32, i32* %p, i32 2
+  store i32 8, i32* %incdec.ptr1, align 4
+  store i32 9, i32* %incdec.ptr2, align 4
+  br label %if.end
+
+if.else:
+  store i32 3, i32* %p, align 4
+  %incdec.ptr5 = getelementptr inbounds i32, i32* %p, i32 2
+  store i32 5, i32* %incdec.ptr1, align 4
+  store i32 6, i32* %incdec.ptr5, align 4
+  br label %if.end
+
+if.end:
+  ret void
+}