[MC] Suppress .Lcfi labels when emitting textual assembly

Summary:
This suppresses the generation of .Lcfi labels in our textual assembler.
It was annoying that this generated cascading .Lcfi labels:
  llc foo.ll -o - | llvm-mc | llvm-mc

After three trips through MCAsmStreamer, we'd have three labels in the
output when none are necessary. We should only bother creating the
labels and frame data when making a real object file.

This supercedes D38605, which moved the entire .seh_ implementation into
MCObjectStreamer.

This has the advantage that we do more checking when emitting textual
assembly, as a minor efficiency cost. Outputting textual assembly is not
performance critical, so this shouldn't matter.

Reviewers: majnemer, MatzeB

Subscribers: qcolombet, nemanjai, javed.absar, eraman, hiraditya, JDevlieghere, llvm-commits

Differential Revision: https://reviews.llvm.org/D38638

llvm-svn: 315259

1 files changed, 0 insertions, 22 deletions

diff --git a/llvm/test/CodeGen/XCore/epilogue_prologue.ll b/llvm/test/CodeGen/XCore/epilogue_prologue.ll
index d214c40dd9b..30e1bb9d86a 100644
--- a/llvm/test/CodeGen/XCore/epilogue_prologue.ll
+++ b/llvm/test/CodeGen/XCore/epilogue_prologue.ll
@@ -62,18 +62,13 @@ entry:
 ; FP + large frame: spill FP+SR = entsp 2 + 100000
 ; CHECKFP-LABEL: f4:
 ; CHECKFP: entsp 65535
-; CHECKFP-NEXT: .Lcfi{{[0-9]+}}
 ; CHECKFP-NEXT: .cfi_def_cfa_offset 262140
-; CHECKFP-NEXT: .Lcfi{{[0-9]+}}
 ; CHECKFP-NEXT: .cfi_offset 15, 0
 ; CHECKFP-NEXT: extsp 34467
-; CHECKFP-NEXT: .Lcfi{{[0-9]+}}
 ; CHECKFP-NEXT: .cfi_def_cfa_offset 400008
 ; CHECKFP-NEXT: stw r10, sp[1]
-; CHECKFP-NEXT: .Lcfi{{[0-9]+}}
 ; CHECKFP-NEXT: .cfi_offset 10, -400004
 ; CHECKFP-NEXT: ldaw r10, sp[0]
-; CHECKFP-NEXT: .Lcfi{{[0-9]+}}
 ; CHECKFP-NEXT: .cfi_def_cfa_register 10
 ; CHECKFP-NEXT: set sp, r10
 ; CHECKFP-NEXT: ldw r10, sp[1]
@@ -83,12 +78,9 @@ entry:
 ; !FP + large frame: spill SR+SR = entsp 2 + 100000
 ; CHECK-LABEL: f4:
 ; CHECK: entsp 65535
-; CHECK-NEXT: .Lcfi{{[0-9]+}}
 ; CHECK-NEXT: .cfi_def_cfa_offset 262140
-; CHECK-NEXT: .Lcfi{{[0-9]+}}
 ; CHECK-NEXT: .cfi_offset 15, 0
 ; CHECK-NEXT: extsp 34467
-; CHECK-NEXT: .Lcfi{{[0-9]+}}
 ; CHECK-NEXT: .cfi_def_cfa_offset 400008
 ; CHECK-NEXT: ldaw sp, sp[65535]
 ; CHECK-NEXT: retsp 34467
@@ -109,28 +101,20 @@ entry:
 ; CHECKFP-NEXT: .text
 ; CHECKFP-LABEL: f6:
 ; CHECKFP: entsp 65535
-; CHECKFP-NEXT: .Lcfi{{[0-9]+}}
 ; CHECKFP-NEXT: .cfi_def_cfa_offset 262140
-; CHECKFP-NEXT: .Lcfi{{[0-9]+}}
 ; CHECKFP-NEXT: .cfi_offset 15, 0
 ; CHECKFP-NEXT: extsp 65535
-; CHECKFP-NEXT: .Lcfi{{[0-9]+}}
 ; CHECKFP-NEXT: .cfi_def_cfa_offset 524280
 ; CHECKFP-NEXT: extsp 65535
-; CHECKFP-NEXT: .Lcfi{{[0-9]+}}
 ; CHECKFP-NEXT: .cfi_def_cfa_offset 786420
 ; CHECKFP-NEXT: extsp 3398
-; CHECKFP-NEXT: .Lcfi{{[0-9]+}}
 ; CHECKFP-NEXT: .cfi_def_cfa_offset 800012
 ; CHECKFP-NEXT: stw r10, sp[1]
-; CHECKFP-NEXT: .Lcfi{{[0-9]+}}
 ; CHECKFP-NEXT: .cfi_offset 10, -800008
 ; CHECKFP-NEXT: ldaw r10, sp[0]
-; CHECKFP-NEXT: .Lcfi{{[0-9]+}}
 ; CHECKFP-NEXT: .cfi_def_cfa_register 10
 ; CHECKFP-NEXT: ldw r1, cp[.LCPI[[CNST0]]]
 ; CHECKFP-NEXT: stw [[REG:r[4-9]+]], r10[r1]
-; CHECKFP-NEXT: .Lcfi{{[0-9]+}}
 ; CHECKFP-NEXT: .cfi_offset 4, -4
 ; CHECKFP-NEXT: mov [[REG]], r0
 ; CHECKFP-NEXT: extsp 1
@@ -162,23 +146,17 @@ entry:
 ; CHECK-NEXT: .text
 ; CHECK-LABEL: f6:
 ; CHECK: entsp 65535
-; CHECK-NEXT: .Lcfi{{[0-9]+}}
 ; CHECK-NEXT: .cfi_def_cfa_offset 262140
-; CHECK-NEXT: .Lcfi{{[0-9]+}}
 ; CHECK-NEXT: .cfi_offset 15, 0
 ; CHECK-NEXT: extsp 65535
-; CHECK-NEXT: .Lcfi{{[0-9]+}}
 ; CHECK-NEXT: .cfi_def_cfa_offset 524280
 ; CHECK-NEXT: extsp 65535
-; CHECK-NEXT: .Lcfi{{[0-9]+}}
 ; CHECK-NEXT: .cfi_def_cfa_offset 786420
 ; CHECK-NEXT: extsp 3399
-; CHECK-NEXT: .Lcfi{{[0-9]+}}
 ; CHECK-NEXT: .cfi_def_cfa_offset 800016
 ; CHECK-NEXT: ldaw r1, sp[0]
 ; CHECK-NEXT: ldw r2, cp[.LCPI[[CNST0]]]
 ; CHECK-NEXT: stw [[REG:r[4-9]+]], r1[r2]
-; CHECK-NEXT: .Lcfi{{[0-9]+}}
 ; CHECK-NEXT: .cfi_offset 4, -4
 ; CHECK-NEXT: mov [[REG]], r0
 ; CHECK-NEXT: ldaw r0, sp[3]