Use separate random number generator for each randomization pass

tests_lit/llvm2ice_tests/reorder-basic-blocks.ll

Index: tests_lit/llvm2ice_tests/reorder-basic-blocks.ll
diff --git a/tests_lit/llvm2ice_tests/reorder-basic-blocks.ll b/tests_lit/llvm2ice_tests/reorder-basic-blocks.ll
index d390ff367f1ccdaa31a51b832b3470b494d1ba68..ec468fba33d9f468afa751d85ad139c0b8973583 100644
--- a/tests_lit/llvm2ice_tests/reorder-basic-blocks.ll
+++ b/tests_lit/llvm2ice_tests/reorder-basic-blocks.ll
@@ -5,9 +5,9 @@
 ; RUN: %p2i -i %s --filetype=asm --args -O2 -sz-seed=1 \
 ; RUN: -reorder-basic-blocks -threads=0 \
 ; RUN: | FileCheck %s --check-prefix=SEED1
-; RUN: %p2i -i %s --filetype=asm --args -O2 -sz-seed=2 \
+; RUN: %p2i -i %s --filetype=asm --args -O2 -sz-seed=3 \

[Jim Stichnoth, 2015/08/19 19:03:04]

Why did the seed have to change?  I assume it was because seed=1 and seed=2
produced identical results for this small test?

[qining, 2015/08/19 23:25:49]

Done. Actually the result of seed=2 is: entry->1->2->3->4. I've changed back to
seed=2, as 3 looks really weird.

 ; RUN: -reorder-basic-blocks -threads=0 \
-; RUN: | FileCheck %s --check-prefix=SEED2
+; RUN: | FileCheck %s --check-prefix=SEED3
 
 define void @basic_block_reordering(i32 %foo, i32 %bar) {
 entry:
@@ -27,15 +27,15 @@ BB4:
 
 ; SEED1-LABEL: basic_block_reordering:
 ; SEED1: .Lbasic_block_reordering$entry:
-; SEED1: .Lbasic_block_reordering$BB1:
 ; SEED1: .Lbasic_block_reordering$BB2:
-; SEED1: .Lbasic_block_reordering$BB3:
+; SEED1: .Lbasic_block_reordering$BB1:
 ; SEED1: .Lbasic_block_reordering$BB4:
+; SEED1: .Lbasic_block_reordering$BB3:
 
-; SEED2-LABEL: basic_block_reordering:
-; SEED2: .Lbasic_block_reordering$entry:
-; SEED2: .Lbasic_block_reordering$BB2:
-; SEED2: .Lbasic_block_reordering$BB1:
-; SEED2: .Lbasic_block_reordering$BB4:
-; SEED2: .Lbasic_block_reordering$BB3
+; SEED3-LABEL: basic_block_reordering:
+; SEED3: .Lbasic_block_reordering$entry:
+; SEED3: .Lbasic_block_reordering$BB2:
+; SEED3: .Lbasic_block_reordering$BB1:
+; SEED3: .Lbasic_block_reordering$BB4:
+; SEED3: .Lbasic_block_reordering$BB3
 }