Merge commit '38a8000f30aa' from llvm.org/main into next

Author: git apple-llvm automerger

llvm/lib/Target/BPF/BPFISelLowering.h

@@ -118,7 +118,9 @@ class BPFTargetLowering : public TargetLowering {
     return Op.size() >= 8 ? MVT::i64 : MVT::i32;
   }
 
-  bool isIntDivCheap(EVT VT, AttributeList Attr) const override { return true; }
+  bool isIntDivCheap(EVT VT, AttributeList Attr) const override {
+    return false;
+  }
 
   bool shouldConvertConstantLoadToIntImm(const APInt &Imm,
                                          Type *Ty) const override {

llvm/test/CodeGen/BPF/32-bit-subreg-alu.ll

@@ -200,7 +200,7 @@ entry:
 define dso_local i32 @div_i(i32 %a) local_unnamed_addr #0 {
 entry:
   %div = udiv i32 %a, 15
-; CHECK: w{{[0-9]+}} /= 15
+; CHECK-NOT: w{{[0-9]+}} /= 15
   ret i32 %div
 }
 
@@ -216,7 +216,7 @@ entry:
 define dso_local i32 @rem_i(i32 %a) local_unnamed_addr #0 {
 entry:
   %rem = urem i32 %a, 15
-; CHECK: w{{[0-9]+}} %= 15
+; CHECK-NOT: w{{[0-9]+}} %= 15
   ret i32 %rem
 }
 

llvm/test/CodeGen/BPF/sdiv_error.ll

@@ -2,7 +2,7 @@
 ; RUN: FileCheck %s < %t1
 ; CHECK: unsupported signed division
 
-define i32 @test(i32 %len) {
-  %1 = sdiv i32 %len, 15
-  ret i32 %1
+define i64 @test(i64 %len) {
+  %1 = sdiv i64 %len, 15
+  ret i64 %1
 }

llvm/test/CodeGen/BPF/sdiv_to_mul.ll

@@ -0,0 +1,57 @@
+; RUN: llc -march=bpfel -mcpu=v1 < %s | FileCheck --check-prefix=CHECK-V1 %s
+; RUN: llc -march=bpfel -mcpu=v4 < %s | FileCheck --check-prefix=CHECK-V4 %s
+
+target triple = "bpf"
+
+;   struct S {
+;     int var[3];
+;   };
+;   int foo1 (struct S *a, struct S *b)
+;   {
+;     return a - b;
+;   }
+define dso_local i32 @foo1(ptr noundef %a, ptr noundef %b) local_unnamed_addr {
+entry:
+  %sub.ptr.lhs.cast = ptrtoint ptr %a to i64
+  %sub.ptr.rhs.cast = ptrtoint ptr %b to i64
+  %sub.ptr.sub = sub i64 %sub.ptr.lhs.cast, %sub.ptr.rhs.cast
+  %sub.ptr.div = sdiv exact i64 %sub.ptr.sub, 12
+  %conv = trunc i64 %sub.ptr.div to i32
+  ret i32 %conv
+}
+; CHECK-V1:        r0 = r1
+; CHECK-V1:        r0 -= r2
+; CHECK-V1:        r0 s>>= 2
+; CHECK-V1:        r1 = -6148914691236517205 ll
+; CHECK-V1:        r0 *= r1
+; CHECK-V1:        exit
+
+; CHECK-V4:        r0 = r1
+; CHECK-V4:        r0 -= r2
+; CHECK-V4:        r0 >>= 2
+; CHECK-V4:        w0 *= -1431655765
+; CHECK-V4:        exit
+
+define dso_local noundef range(i32 -143165576, 143165577) i32 @foo2(i32 noundef %a) local_unnamed_addr {
+entry:
+  %div = sdiv i32 %a, 15
+  ret i32 %div
+}
+; CHECK-V1-NOT:   r[[#]] s/= 15
+; CHECK-V4-NOT:   w[[#]] s/= 15
+
+define dso_local noundef range(i32 -14, 15) i32 @foo3(i32 noundef %a) local_unnamed_addr {
+entry:
+  %rem = srem i32 %a, 15
+  ret i32 %rem
+}
+; CHECK-V1-NOT:   r[[#]] s%= 15
+; CHECK-V4-NOT:   w[[#]] s%= 15
+
+define dso_local i64 @foo4(i64 noundef %a) local_unnamed_addr {
+entry:
+  %div = udiv exact i64 %a, 15
+  ret i64 %div
+}
+; CHECK-V1-NOT:   r[[#]] /= 15
+; CHECK-V4-NOT:   w[[#]] /= 15

llvm/test/CodeGen/BPF/srem_error.ll

@@ -2,7 +2,7 @@
 ; RUN: FileCheck %s < %t1
 ; CHECK: unsupported signed division
 
-define i32 @test(i32 %len) {
-  %1 = srem i32 %len, 15
-  ret i32 %1
+define i64 @test(i64 %len) {
+  %1 = srem i64 %len, 15
+  ret i64 %1
 }