Revert "Revert "Thumb2: Reduce memory used for fixup dependencies.""
Fix: Correctly ignore dependencies of the non-expandable
fixups rather than non-expandable dependents of any fixups.
Bug: 28343425
Bug: 28256882
This reverts commit d89e2418f2c6d9897fee219f8df9c20ca93c80db.
Change-Id: I7161fbfd094ce1ddc097826b53c894a7377a2b9d
diff --git a/compiler/utils/arm/assembler_thumb2_test.cc b/compiler/utils/arm/assembler_thumb2_test.cc
index 650b089..b5cafcb 100644
--- a/compiler/utils/arm/assembler_thumb2_test.cc
+++ b/compiler/utils/arm/assembler_thumb2_test.cc
@@ -372,6 +372,31 @@
DriverStr(expected, "StoreWordPairToNonThumbOffset");
}
+TEST_F(AssemblerThumb2Test, DistantBackBranch) {
+ Label start, end;
+ __ Bind(&start);
+ constexpr size_t kLdrR0R0Count1 = 256;
+ for (size_t i = 0; i != kLdrR0R0Count1; ++i) {
+ __ ldr(arm::R0, arm::Address(arm::R0));
+ }
+ __ b(&end, arm::EQ);
+ __ b(&start, arm::LT);
+ constexpr size_t kLdrR0R0Count2 = 256;
+ for (size_t i = 0; i != kLdrR0R0Count2; ++i) {
+ __ ldr(arm::R0, arm::Address(arm::R0));
+ }
+ __ Bind(&end);
+
+ std::string expected =
+ "0:\n" +
+ RepeatInsn(kLdrR0R0Count1, "ldr r0, [r0]\n") +
+ "beq 1f\n"
+ "blt 0b\n" +
+ RepeatInsn(kLdrR0R0Count2, "ldr r0, [r0]\n") +
+ "1:\n";
+ DriverStr(expected, "DistantBackBranch");
+}
+
TEST_F(AssemblerThumb2Test, TwoCbzMaxOffset) {
Label label0, label1, label2;
__ cbz(arm::R0, &label1);