[AsmPrinter] refactor to support %c w/ GlobalAddress'

Summary:
Targets like ARM, MSP430, PPC, and SystemZ have complex behavior when
printing the address of a MachineOperand::MO_GlobalAddress. Move that
handling into a new overriden method in each base class. A virtual
method was added to the base class for handling the generic case.

Refactors a few subclasses to support the target independent %a, %c, and
%n.

The patch also contains small cleanups for AVRAsmPrinter and
SystemZAsmPrinter.

It seems that NVPTXTargetLowering is possibly missing some logic to
transform GlobalAddressSDNodes for
TargetLowering::LowerAsmOperandForConstraint to handle with "i" extended
inline assembly asm constraints.

Fixes:
- https://bugs.llvm.org/show_bug.cgi?id=41402
- https://github.com/ClangBuiltLinux/linux/issues/449

Reviewers: echristo, void

Reviewed By: void

Subscribers: void, craig.topper, jholewinski, dschuff, jyknight, dylanmckay, sdardis, nemanjai, javed.absar, sbc100, jgravelle-google, eraman, kristof.beyls, hiraditya, aheejin, kbarton, fedor.sergeev, jrtc27, atanasyan, jsji, llvm-commits, kees, tpimh, nathanchance, peter.smith, srhines

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D60887

llvm-svn: 359337

1 files changed, 26 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/SPARC/inlineasm-output-template.ll b/llvm/test/CodeGen/SPARC/inlineasm-output-template.ll
new file mode 100644
index 00000000000..63fae9f0f38
--- /dev/null
+++ b/llvm/test/CodeGen/SPARC/inlineasm-output-template.ll
@@ -0,0 +1,26 @@
+; RUN: llc -mtriple=sparc-linux-gnu < %s | FileCheck %s
+
+; Test that %c works with immediates
+; CHECK-LABEL: test_inlineasm_c_output_template0
+; CHECK: !TEST 42
+define dso_local i32 @test_inlineasm_c_output_template0() {
+  tail call void asm sideeffect "!TEST ${0:c}", "i"(i32 42)
+  ret i32 42
+}
+
+; Test that %c works with global address
+; CHECK-LABEL: test_inlineasm_c_output_template1
+; CHECK: !TEST baz
+@baz = internal global i32 0, align 4
+define dso_local i32 @test_inlineasm_c_output_template1() {
+  tail call void asm sideeffect "!TEST ${0:c}", "i"(i32* nonnull @baz)
+  ret i32 42
+}
+
+; Test that %n works with immediates
+; CHECK-LABEL: test_inlineasm_c_output_template2
+; CHECK: !TEST -42
+define dso_local i32 @test_inlineasm_c_output_template2() {
+  tail call void asm sideeffect "!TEST ${0:n}", "i"(i32 42)
+  ret i32 42
+}