File backport-llvm-r212701 of Package llvm

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File backport-llvm-r212701 of Package llvm

------------------------------------------------------------------------
r212701 | rsandifo | 2014-07-10 12:45:11 +0200 (Thu, 10 Jul 2014) | 6 lines

[SystemZ] Fix FPR dwarf numbering

The dwarf FPR numbers are supposed to have the order F0, F2, F4, F6,
F1, F3, F5, F7, F8, etc., which matches the pairing of registers for
long doubles.  E.g. a long double stored in F0 is paired with F2.

------------------------------------------------------------------------
Index: test/DebugInfo/SystemZ/eh_frame.s
===================================================================
--- test/DebugInfo/SystemZ/eh_frame.s.orig
+++ test/DebugInfo/SystemZ/eh_frame.s
@@ -11,9 +11,25 @@ check_largest_class:
 	.cfi_offset %r13, -56
 	.cfi_offset %r14, -48
 	.cfi_offset %r15, -40
-	aghi	%r15, -160
-	.cfi_def_cfa_offset 320
-	lmg	%r13, %r15, 264(%r15)
+	aghi	%r15, -224
+	.cfi_def_cfa_offset 384
+	std	%f8, 160(%r15)
+	std	%f9, 168(%r15)
+	std	%f10, 176(%r15)
+	std	%f11, 184(%r15)
+	std	%f12, 192(%r15)
+	std	%f13, 200(%r15)
+	std	%f14, 208(%r15)
+	std	%f15, 216(%r15)
+	.cfi_offset %f8, -224
+	.cfi_offset %f9, -216
+	.cfi_offset %f10, -208
+	.cfi_offset %f11, -200
+	.cfi_offset %f12, -192
+	.cfi_offset %f13, -184
+	.cfi_offset %f14, -176
+	.cfi_offset %f15, -168
+	lmg	%r13, %r15, 328(%r15)
 	br	%r14
 	.size	check_largest_class, .-check_largest_class
 	.cfi_endproc
@@ -22,7 +38,7 @@ check_largest_class:
 #
 # Contents of the .eh_frame section:
 #
-# 00000000 0000001c 00000000 CIE
+# 00000000 0000000000000014 00000000 CIE
 #   Version:               1
 #   Augmentation:          "zR"
 #   Code alignment factor: 1
@@ -35,20 +51,29 @@ check_largest_class:
 #   DW_CFA_nop
 #   DW_CFA_nop
 #
-# 00000020 0000001c 00000024 FDE cie=00000000 pc=00000000..00000012
-#   DW_CFA_advance_loc: 6 to 00000006
+# 000000.. 000000000000002c 0000001c FDE cie=00000000 pc=0000000000000000..0000000000000032
+#   DW_CFA_advance_loc: 6 to 0000000000000006
 #   DW_CFA_offset: r13 at cfa-56
 #   DW_CFA_offset: r14 at cfa-48
 #   DW_CFA_offset: r15 at cfa-40
-#   DW_CFA_advance_loc: 4 to 0000000a
-#   DW_CFA_def_cfa_offset: 320
-#   DW_CFA_nop
+#   DW_CFA_advance_loc: 4 to 000000000000000a
+#   DW_CFA_def_cfa_offset: 384
+#   DW_CFA_advance_loc: 32 to 000000000000002a
+#   DW_CFA_offset: r24 at cfa-224
+#   DW_CFA_offset: r28 at cfa-216
+#   DW_CFA_offset: r25 at cfa-208
+#   DW_CFA_offset: r29 at cfa-200
+#   DW_CFA_offset: r26 at cfa-192
+#   DW_CFA_offset: r30 at cfa-184
+#   DW_CFA_offset: r27 at cfa-176
+#   DW_CFA_offset: r31 at cfa-168
 #   DW_CFA_nop
 #   DW_CFA_nop
 #   DW_CFA_nop
 #
 # CHECK: Contents of section .eh_frame:
-# CHECK-NEXT: 0000 00000014 00000000 017a5200 01780e01  .........zR..x..
-# CHECK-NEXT: 0010 1b0c0fa0 01000000 0000001c 0000001c  ................
-# CHECK-NEXT: 0020 00000000 00000012 00468d07 8e068f05  .........F......
-# CHECK-NEXT: 0030 440ec002 00000000                    D.......
+# CHECK-NEXT: 0000 00000014 00000000 017a5200 01780e01  {{.*}}
+# CHECK-NEXT: 0010 1b0c0fa0 01000000 0000002c 0000001c  {{.*}}
+# CHECK-NEXT: 0020 00000000 00000032 00468d07 8e068f05  {{.*}}
+# CHECK-NEXT: 0030 440e8003 60981c9c 1b991a9d 199a189e  {{.*}}
+# CHECK-NEXT: 0040 179b169f 15000000                    {{.*}}
Index: lib/Target/SystemZ/SystemZRegisterInfo.td
===================================================================
--- lib/Target/SystemZ/SystemZRegisterInfo.td.orig
+++ lib/Target/SystemZ/SystemZRegisterInfo.td
@@ -119,6 +119,29 @@ defm ADDR128 : SystemZRegClass<"ADDR128"
 // Floating-point registers
 //===----------------------------------------------------------------------===//
 
+// Maps FPR register numbers to their DWARF encoding.
+class DwarfMapping<int id> { int Id = id; }
+
+def F0Dwarf  : DwarfMapping<16>;
+def F2Dwarf  : DwarfMapping<17>;
+def F4Dwarf  : DwarfMapping<18>;
+def F6Dwarf  : DwarfMapping<19>;
+
+def F1Dwarf  : DwarfMapping<20>;
+def F3Dwarf  : DwarfMapping<21>;
+def F5Dwarf  : DwarfMapping<22>;
+def F7Dwarf  : DwarfMapping<23>;
+
+def F8Dwarf  : DwarfMapping<24>;
+def F10Dwarf : DwarfMapping<25>;
+def F12Dwarf : DwarfMapping<26>;
+def F14Dwarf : DwarfMapping<27>;
+
+def F9Dwarf  : DwarfMapping<28>;
+def F11Dwarf : DwarfMapping<29>;
+def F13Dwarf : DwarfMapping<30>;
+def F15Dwarf : DwarfMapping<31>;
+
 // Lower 32 bits of one of the 16 64-bit floating-point registers
 class FPR32<bits<16> num, string n> : SystemZReg<n> {
   let HWEncoding = num;
@@ -142,7 +165,7 @@ class FPR128<bits<16> num, string n, FPR
 foreach I = 0-15 in {
   def F#I#S : FPR32<I, "f"#I>;
   def F#I#D : FPR64<I, "f"#I, !cast<FPR32>("F"#I#"S")>,
-              DwarfRegNum<[!add(I, 16)]>;
+              DwarfRegNum<[!cast<DwarfMapping>("F"#I#"Dwarf").Id]>;
 }
 
 foreach I = [0, 1, 4, 5, 8, 9, 12, 13] in {

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