Implemented aligning and poisoning global redzones

tests_lit/asan_tests/globalredzones.ll

 ; Test of global redzone layout
 
 ; REQUIRES: allow_dump
 
 ; RUN: %p2i -i %s --args -threads=0 -fsanitize-address \
 ; RUN:     | FileCheck %s
 ; RUN: %p2i -i %s --args -verbose=global_init,inst -threads=0 \
 ; RUN:     -fsanitize-address | FileCheck --check-prefix=DUMP %s
 
 ; The array of redzones
 
 ; DUMP-LABEL: ========= Instrumented Globals =========
-; DUMP: @__$rz0 = internal constant <{ i32, i32, i32, i32, i32, i32 }>
-; DUMP:         <{ i32 ptrtoint ([32 x i8]* @__$rz2 to i32), i32 ptrtoint ([32 x i8]* @__$rz3 to i32),
-; DUMP:         i32 ptrtoint ([32 x i8]* @__$rz4 to i32), i32 ptrtoint ([32 x i8]* @__$rz5 to i32),
-; DUMP:         i32 ptrtoint ([32 x i8]* @__$rz6 to i32), i32 ptrtoint ([32 x i8]* @__$rz7 to i32) }>
-; DUMP-NEXT: @__$rz1 = internal constant [4 x i8] c"\06\00\00\00"                                                                                                 
+; DUMP: @__$rz_array = internal constant <{ i32, i32, i32, i32, i32, i32 }>
+; DUMP:         <{ i32 ptrtoint ([32 x i8]* @__$rz0 to i32), i32 ptrtoint ([32 x i8]* @__$rz1 to i32),
+; DUMP:         i32 ptrtoint ([32 x i8]* @__$rz2 to i32), i32 ptrtoint ([32 x i8]* @__$rz3 to i32),
+; DUMP:         i32 ptrtoint ([32 x i8]* @__$rz4 to i32), i32 ptrtoint ([32 x i8]* @__$rz5 to i32) }>
 
-; CHECK-LABEL: .type   __$rz0,%object
+; (SPACE is 32 ascii)
+; DUMP-NEXT: @__$rz_sizes = internal constant <{ [4 x i8], [4 x i8], [4 x i8], [4 x i8], [4 x i8],
+; DUMP-SAME: [4 x i8] }> <{ [4 x i8] c" \00\00\00", [4 x i8] c" \00\00\00", [4 x i8] c" \00\00\00",
+; DUMP-SAME: [4 x i8] c" \00\00\00", [4 x i8] c" \00\00\00", [4 x i8] c" \00\00\00" }>
+
+; CHECK-LABEL: .type   __$rz_array,%object
 ; CHECK-NEXT: .section   .rodata
-; CHECK-NEXT: __$rz0:
+; CHECK-NEXT: __$rz_array:
+; CHECK-NEXT: .long   __$rz0
+; CHECK-NEXT: .long   __$rz1
 ; CHECK-NEXT: .long   __$rz2
 ; CHECK-NEXT: .long   __$rz3
 ; CHECK-NEXT: .long   __$rz4
 ; CHECK-NEXT: .long   __$rz5
-; CHECK-NEXT: .long   __$rz6
-; CHECK-NEXT: .long   __$rz7
-; CHECK-LABEL: .type   __$rz1,%object
+; CHECK-LABEL: .type   __$rz_sizes,%object
 ; CHECK-NEXT: .section   .rodata
-; CHECK-NEXT: __$rz1:
-; CHECK-NEXT: .byte   6
+; CHECK-NEXT: __$rz_sizes:
+; CHECK-NEXT: .byte   32
 ; CHECK-NEXT: .byte   0
 ; CHECK-NEXT: .byte   0
 ; CHECK-NEXT: .byte   0
+; CHECK-NEXT: .byte   32
+; CHECK-NEXT: .byte   0
+; CHECK-NEXT: .byte   0
+; CHECK-NEXT: .byte   0
+; CHECK-NEXT: .byte   32
+; CHECK-NEXT: .byte   0
+; CHECK-NEXT: .byte   0
+; CHECK-NEXT: .byte   0
+; CHECK-NEXT: .byte   32
+; CHECK-NEXT: .byte   0
+; CHECK-NEXT: .byte   0
+; CHECK-NEXT: .byte   0
+; CHECK-NEXT: .byte   32
+; CHECK-NEXT: .byte   0
+; CHECK-NEXT: .byte   0
+; CHECK-NEXT: .byte   0
+; CHECK-NEXT: .byte   32
+; CHECK-NEXT: .byte   0
+; CHECK-NEXT: .byte   0
+; CHECK-NEXT: .byte   0
 
 ; A zero-initialized global
 @zeroInitGlobal = internal global [32 x i8] zeroinitializer
 
-; DUMP-NEXT: @__$rz2 = internal global [32 x i8] zeroinitializer
+; DUMP-NEXT: @__$rz0 = internal global [32 x i8] zeroinitializer
 ; DUMP-NEXT: @zeroInitGlobal = internal global [32 x i8] zeroinitializer
-; DUMP-NEXT: @__$rz3 = internal global [32 x i8] zeroinitializer
+; DUMP-NEXT: @__$rz1 = internal global [32 x i8] zeroinitializer
 
-; CHECK-LABEL: .type   __$rz2,%object
+; CHECK-LABEL: .type   __$rz0,%object
 ; CHECK-NEXT: .section   .bss
-; CHECK-NEXT: __$rz2:
+; CHECK-NEXT: .p2align   5
+; CHECK-NEXT: __$rz0:
 ; CHECK-LABEL: .type   zeroInitGlobal,%object
 ; CHECK-NEXT: .section   .bss
+; CHECK-NEXT: .p2align   5
 ; CHECK-NEXT: zeroInitGlobal:
-; CHECK-LABEL: .type   __$rz3,%object
+; CHECK-LABEL: .type   __$rz1,%object
 ; CHECK-NEXT: .section   .bss
-; CHECK-NEXT: __$rz3:
+; CHECK-NEXT: __$rz1:
 
 ; A constant-initialized global
 @constInitGlobal = internal constant [32 x i8] c"ABCDEFGHIJKLMNOPQRSTUVWXYZ012345"
 
-; CHECK-LABEL: .type   __$rz4,%object
+; CHECK-LABEL: .type   __$rz2,%object
 ; CHECK-NEXT: .section   .rodata
-; CHECK-NEXT: __$rz4:
+; CHECK-NEXT: .p2align   5
+; CHECK-NEXT: __$rz2:
 ; CHECK-LABEL: .type   constInitGlobal,%object
 ; CHECK-NEXT: .section   .rodata
+; CHECK-NEXT: .p2align   5
 ; CHECK-NEXT: constInitGlobal:
-; CHECK-LABEL: .type   __$rz5,%object
+; CHECK-LABEL: .type   __$rz3,%object
 ; CHECK-NEXT: .section   .rodata
-; CHECK-NEXT: __$rz5:
+; CHECK-NEXT: __$rz3:
 
-; DUMP-NEXT: @__$rz4 = internal constant [32 x i8] c"RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR"
+; DUMP-NEXT: @__$rz2 = internal constant [32 x i8] c"RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR"
 ; DUMP-NEXT: @constInitGlobal = internal constant [32 x i8] c"ABCDEFGHIJKLMNOPQRSTUVWXYZ012345"
-; DUMP-NEXT: @__$rz5 = internal constant [32 x i8] c"RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR"
+; DUMP-NEXT: @__$rz3 = internal constant [32 x i8] c"RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR"
 
 ; A regular global
 @regInitGlobal = internal global [32 x i8] c"ABCDEFGHIJKLMNOPQRSTUVWXYZ012345"
 
-; DUMP-NEXT: @__$rz6 = internal global [32 x i8] c"RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR"
+; DUMP-NEXT: @__$rz4 = internal global [32 x i8] c"RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR"
 ; DUMP-NEXT: @regInitGlobal = internal global [32 x i8] c"ABCDEFGHIJKLMNOPQRSTUVWXYZ012345"
-; DUMP-NEXT: @__$rz7 = internal global [32 x i8] c"RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR"
+; DUMP-NEXT: @__$rz5 = internal global [32 x i8] c"RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR"
 
-; CHECK-LABEL: .type   __$rz6,%object
+; CHECK-LABEL: .type   __$rz4,%object
 ; CHECK-NEXT: .section   .data
-; CHECK-NEXT: __$rz6:
+; CHECK-NEXT: .p2align   5
+; CHECK-NEXT: __$rz4:
 ; CHECK-LABEL: .type   regInitGlobal,%object
 ; CHECK-NEXT: .section   .data
+; CHECK-NEXT: .p2align   5
 ; CHECK-NEXT: regInitGlobal:
-; CHECK-LABEL: .type   __$rz7,%object
+; CHECK-LABEL: .type   __$rz5,%object
 ; CHECK-NEXT: .section   .data
-; CHECK-NEXT: __$rz7:
+; CHECK-NEXT: __$rz5:
 
 define internal void @func() {
   ret void
 }
 
 ; DUMP-LABEL: define internal void @func() {
 ; CHECK-LABEL: func: