Fix the fde encoding used by mips to match gas.

This finally fixes the encoding. The patch also
* Removes eh-frame.ll. It was an unnecessary .ll to .o test that was checking
  the wrong value.
* Merge fde-reloc.s and eh-frame.s into a single test, since the only difference
  was the run lines.
* Don't blindly test the content of the entire .eh_frame section. It makes it
  hard to anyone actually fixing a bug and hitting a difference in a binary
  blob. Instead, use a CHECK for each field and document what is being checked.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178615 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 156 insertions, 35 deletions

diff --git a/test/MC/Mips/eh-frame.s b/test/MC/Mips/eh-frame.s
index 56278b8..67df213 100644
--- a/test/MC/Mips/eh-frame.s
+++ b/test/MC/Mips/eh-frame.s
@@ -1,46 +1,167 @@
-// Assembler generated object test.
-// This tests .eh_frame descriptors minimally.
+// Test the bits of .eh_frame on mips that are already implemented correctly.
 
-// What we really need is a prettyprinter output check not unlike what
-// gnu's readobj generates instead of checking the bits for .eh_frame.
+// FIXME: This test would be a lot cleaner if llvm-objdump had the
+// --dwarf=frames option.
 
-// RUN: llvm-mc -filetype=obj -mcpu=mips32r2 -triple mipsel-unknown-linux -arch=mipsel %s -o - \
-// RUN: | llvm-objdump -s - | FileCheck -check-prefix=CHECK-LEO32 %s
+// RUN: llvm-mc -filetype=obj %s -o %t.o -arch=mips
+// RUN: llvm-objdump -r -s %t.o | FileCheck --check-prefix=MIPS32 %s
 
-// RUN: llvm-mc -filetype=obj -mcpu=mips32r2 -triple mips-unknown-linux -arch=mips %s -o - \
-// RUN: | llvm-objdump -s - | FileCheck -check-prefix=CHECK-BEO32 %s
+// RUN: llvm-mc -filetype=obj %s -o %t.o -arch=mipsel
+// RUN: llvm-objdump -r -s %t.o | FileCheck --check-prefix=MIPS32EL %s
 
-// RUN: llvm-mc -filetype=obj -mcpu=mips64r2 -mattr=n64 -arch=mips64el %s -o - \
-// RUN: | llvm-objdump -s - | FileCheck -check-prefix=CHECK-LE64 %s
+// RUN: llvm-mc -filetype=obj %s -o %t.o -arch=mips64
+// RUN: llvm-objdump -r -s %t.o | FileCheck --check-prefix=MIPS64 %s
 
-// RUN: llvm-mc -filetype=obj -mcpu=mips64r2 -mattr=n64 -arch=mips64 %s -o - \
-// RUN: | llvm-objdump -s - | FileCheck -check-prefix=CHECK-BE64 %s
+// RUN: llvm-mc -filetype=obj %s -o %t.o -arch=mips64el
+// RUN: llvm-objdump -r -s %t.o | FileCheck --check-prefix=MIPS64EL %s
 
-// O32 little endian
-// CHECK-LEO32: Contents of section .eh_frame:
-// CHECK-LEO32-NEXT: 0000 10000000 00000000 017a5200 017c1f01  .........zR..|..
-// CHECK-LEO32-NEXT: 0010 000c1d00 10000000 18000000 00000000  ................
-// CHECK-LEO32-NEXT: 0020 00000000 00000000                    ........
+func:
+	.cfi_startproc
+	.cfi_endproc
 
-// O32 big endian
-// CHECK-BEO32: Contents of section .eh_frame:
-// CHECK-BEO32-NEXT 0000 00000010 00000000 017a5200 017c1f01  .........zR..|..
-// CHECK-BEO32-NEXT 0010 000c1d00 00000010 00000018 00000000  ................
-// CHECK-BEO32-NEXT 0020 00000000 00000000                    ........
+// MIPS32: RELOCATION RECORDS FOR [.eh_frame]:
+// MIPS32-NEXT: R_MIPS_32
+// MIPS32: Contents of section .eh_frame:
+// MIPS32-NEXT: 0000
 
-// N64 little endian
-// CHECK-LE64: Contents of section .eh_frame:
-// CHECK-LE64-NEXT: 0000 10000000 00000000 017a5200 01781f01  .........zR..x..
-// CHECK-LE64-NEXT: 0010 000c1d00 18000000 18000000 00000000  ................
-// CHECK-LE64-NEXT: 0020 00000000 00000000 00000000 00000000  ................
+// Length
+// MIPS32: 00000010
 
-// N64 big endian
-// CHECK-BE64: Contents of section .eh_frame:
-// CHECK-BE64-NEXT: 0000 00000010 00000000 017a5200 01781f01  .........zR..x..
-// CHECK-BE64-NEXT: 0010 000c1d00 00000018 00000018 00000000  ................
-// CHECK-BE64-NEXT: 0020 00000000 00000000 00000000 00000000  ................
+// CIE ID
+// MIPS32: 00000000
 
-func:
-	.cfi_startproc
-	.cfi_endproc
+// Version
+// MIPS32: 01
+
+// Augmentation String
+// MIPS32: 7a5200
+
+// Code Alignment Factor
+// MIPS32: 01
+
+// Data Alignment Factor (-4)
+// MIPS32: 7c
+
+// Return Address Register
+// MIPS32: 1f
+
+// Augmentation Size
+// MIPS32: 01
+
+// MIPS32: .........zR..|..
+// MIPS32-NEXT: 0010
+
+// Augmentation (fde pointer encoding: DW_EH_PE_sdata4)
+// MIPS32: 0b
+// FIXME: The instructions are different from the ones produces by gas.
+
+// MIPS32EL: RELOCATION RECORDS FOR [.eh_frame]:
+// MIPS32EL-NEXT: R_MIPS_32
+// MIPS32EL: Contents of section .eh_frame:
+// MIPS32EL-NEXT: 0000
+
+// Length
+// MIPS32EL: 10000000
+
+// CIE ID
+// MIPS32EL: 00000000
+
+// Version
+// MIPS32EL: 01
+
+// Augmentation String
+// MIPS32EL: 7a5200
+
+// Code Alignment Factor
+// MIPS32EL: 01
+
+// Data Alignment Factor (-4)
+// MIPS32EL: 7c
+
+// Return Address Register
+// MIPS32EL: 1f
+
+// Augmentation Size
+// MIPS32EL: 01
+
+// MIPS32EL: .........zR..|..
+// MIPS32EL-NEXT: 0010
+
+// Augmentation (fde pointer encoding: DW_EH_PE_sdata4)
+// MIPS32EL: 0b
+// FIXME: The instructions are different from the ones produces by gas.
+
+// MIPS64: RELOCATION RECORDS FOR [.eh_frame]:
+// MIPS64-NEXT: R_MIPS_64
+// MIPS64: Contents of section .eh_frame:
+// MIPS64-NEXT: 0000
+
+// Length
+// MIPS64: 00000010
+
+// CIE ID
+// MIPS64: 00000000
+
+// Version
+// MIPS64: 01
+
+// Augmentation String
+// MIPS64: 7a5200
+
+// Code Alignment Factor
+// MIPS64: 01
+
+// Data Alignment Factor (-8). GAS uses -4. Should be ok as long as all
+// offsets we need are a multiple of 8.
+// MIPS64: 78
+
+// Return Address Register
+// MIPS64: 1f
+
+// Augmentation Size
+// MIPS64: 01
+
+// MIPS64: .........zR..x..
+// MIPS64-NEXT: 0010
+
+// Augmentation (fde pointer encoding: DW_EH_PE_sdata8)
+// MIPS64: 0c
+// FIXME: The instructions are different from the ones produces by gas.
+
+
+// MIPS64EL: RELOCATION RECORDS FOR [.eh_frame]:
+// FIXME: llvm-objdump currently misprints the relocations for mips64el
+// MIPS64EL: Contents of section .eh_frame:
+// MIPS64EL-NEXT: 0000
+
+// Length
+// MIPS64EL: 10000000
+
+// CIE ID
+// MIPS64EL: 00000000
+
+// Version
+// MIPS64EL: 01
+
+// Augmentation String
+// MIPS64EL: 7a5200
+
+// Code Alignment Factor
+// MIPS64EL: 01
+
+// Data Alignment Factor (-8). GAS uses -4. Should be ok as long as all
+// offsets we need are a multiple of 8.
+// MIPS64EL: 78
+
+// Return Address Register
+// MIPS64EL: 1f
+
+// Augmentation Size
+// MIPS64EL: 01
+
+// MIPS64EL: .........zR..x..
+// MIPS64EL-NEXT: 0010
 
+// Augmentation (fde pointer encoding: DW_EH_PE_sdata8)
+// MIPS64EL: 0c
+// FIXME: The instructions are different from the ones produces by gas.