Check if subreg index is zero.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88899 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 155 insertions, 0 deletions

diff --git a/test/CodeGen/PowerPC/2009-11-15-ReMatBug.ll b/test/CodeGen/PowerPC/2009-11-15-ReMatBug.ll
new file mode 100644
index 0000000..54f4b2e
--- /dev/null
+++ b/test/CodeGen/PowerPC/2009-11-15-ReMatBug.ll
@@ -0,0 +1,155 @@
+; RUN: llc < %s -mtriple=powerpc-apple-darwin8
+
+%struct.FILE = type { i8*, i32, i32, i16, i16, %struct.__sbuf, i32, i8*, i32 (i8*)*, i32 (i8*, i8*, i32)*, i64 (i8*, i64, i32)*, i32 (i8*, i8*, i32)*, %struct.__sbuf, %struct.__sFILEX*, i32, [3 x i8], [1 x i8], %struct.__sbuf, i32, i64 }
+%struct.__gcov_var = type { %struct.FILE*, i32, i32, i32, i32, i32, i32, [1025 x i32] }
+%struct.__sFILEX = type opaque
+%struct.__sbuf = type { i8*, i32 }
+%struct.gcov_ctr_info = type { i32, i64*, void (i64*, i32)* }
+%struct.gcov_ctr_summary = type { i32, i32, i64, i64, i64 }
+%struct.gcov_fn_info = type { i32, i32, [0 x i32] }
+%struct.gcov_info = type { i32, %struct.gcov_info*, i32, i8*, i32, %struct.gcov_fn_info*, i32, [0 x %struct.gcov_ctr_info] }
+%struct.gcov_summary = type { i32, [1 x %struct.gcov_ctr_summary] }
+
+@__gcov_var = external global %struct.__gcov_var  ; <%struct.__gcov_var*> [#uses=1]
+@__sF = external global [0 x %struct.FILE]        ; <[0 x %struct.FILE]*> [#uses=1]
+@.str = external constant [56 x i8], align 4      ; <[56 x i8]*> [#uses=1]
+@gcov_list = external global %struct.gcov_info*   ; <%struct.gcov_info**> [#uses=1]
+@.str7 = external constant [35 x i8], align 4     ; <[35 x i8]*> [#uses=1]
+@.str8 = external constant [9 x i8], align 4      ; <[9 x i8]*> [#uses=1]
+@.str9 = external constant [10 x i8], align 4     ; <[10 x i8]*> [#uses=1]
+@.str10 = external constant [36 x i8], align 4    ; <[36 x i8]*> [#uses=1]
+
+declare i32 @"\01_fprintf$LDBL128"(%struct.FILE*, i8*, ...) nounwind
+
+define void @gcov_exit() nounwind {
+entry:
+  %gi_ptr.0357 = load %struct.gcov_info** @gcov_list, align 4 ; <%struct.gcov_info*> [#uses=1]
+  %0 = alloca i8, i32 undef, align 1              ; <i8*> [#uses=3]
+  br i1 undef, label %return, label %bb.nph341
+
+bb.nph341:                                        ; preds = %entry
+  %object27 = bitcast %struct.gcov_summary* undef to i8* ; <i8*> [#uses=1]
+  br label %bb25
+
+bb25:                                             ; preds = %read_fatal, %bb.nph341
+  %gi_ptr.1329 = phi %struct.gcov_info* [ %gi_ptr.0357, %bb.nph341 ], [ undef, %read_fatal ] ; <%struct.gcov_info*> [#uses=1]
+  call void @llvm.memset.i32(i8* %object27, i8 0, i32 36, i32 8)
+  br i1 undef, label %bb49.1, label %bb48
+
+bb48:                                             ; preds = %bb25
+  br label %bb49.1
+
+bb51:                                             ; preds = %bb48.4, %bb49.3
+  switch i32 undef, label %bb58 [
+    i32 0, label %rewrite
+    i32 1734567009, label %bb59
+  ]
+
+bb58:                                             ; preds = %bb51
+  %1 = call i32 (%struct.FILE*, i8*, ...)* @"\01_fprintf$LDBL128"(%struct.FILE* getelementptr inbounds ([0 x %struct.FILE]* @__sF, i32 0, i32 2), i8* getelementptr inbounds ([35 x i8]* @.str7, i32 0, i32 0), i8* %0) nounwind ; <i32> [#uses=0]
+  br label %read_fatal
+
+bb59:                                             ; preds = %bb51
+  br i1 undef, label %bb60, label %bb3.i156
+
+bb3.i156:                                         ; preds = %bb59
+  store i8 52, i8* undef, align 1
+  store i8 42, i8* undef, align 1
+  %2 = call i32 (%struct.FILE*, i8*, ...)* @"\01_fprintf$LDBL128"(%struct.FILE* getelementptr inbounds ([0 x %struct.FILE]* @__sF, i32 0, i32 2), i8* getelementptr inbounds ([56 x i8]* @.str, i32 0, i32 0), i8* %0, i8* undef, i8* undef) nounwind ; <i32> [#uses=0]
+  br label %read_fatal
+
+bb60:                                             ; preds = %bb59
+  br i1 undef, label %bb78.preheader, label %rewrite
+
+bb78.preheader:                                   ; preds = %bb60
+  br i1 undef, label %bb62, label %bb80
+
+bb62:                                             ; preds = %bb78.preheader
+  br i1 undef, label %bb64, label %read_mismatch
+
+bb64:                                             ; preds = %bb62
+  br i1 undef, label %bb65, label %read_mismatch
+
+bb65:                                             ; preds = %bb64
+  br i1 undef, label %bb75, label %read_mismatch
+
+read_mismatch:                                    ; preds = %bb98, %bb119.preheader, %bb72, %bb71, %bb65, %bb64, %bb62
+  %3 = icmp eq i32 undef, -1                      ; <i1> [#uses=1]
+  %iftmp.11.0 = select i1 %3, i8* getelementptr inbounds ([10 x i8]* @.str9, i32 0, i32 0), i8* getelementptr inbounds ([9 x i8]* @.str8, i32 0, i32 0) ; <i8*> [#uses=1]
+  %4 = call i32 (%struct.FILE*, i8*, ...)* @"\01_fprintf$LDBL128"(%struct.FILE* getelementptr inbounds ([0 x %struct.FILE]* @__sF, i32 0, i32 2), i8* getelementptr inbounds ([36 x i8]* @.str10, i32 0, i32 0), i8* %0, i8* %iftmp.11.0) nounwind ; <i32> [#uses=0]
+  br label %read_fatal
+
+bb71:                                             ; preds = %bb75
+  %5 = load i32* undef, align 4                   ; <i32> [#uses=1]
+  %6 = getelementptr inbounds %struct.gcov_info* %gi_ptr.1329, i32 0, i32 7, i32 undef, i32 2 ; <void (i64*, i32)**> [#uses=1]
+  %7 = load void (i64*, i32)** %6, align 4        ; <void (i64*, i32)*> [#uses=1]
+  %8 = call i32 @__gcov_read_unsigned() nounwind  ; <i32> [#uses=1]
+  %9 = call i32 @__gcov_read_unsigned() nounwind  ; <i32> [#uses=1]
+  %10 = icmp eq i32 %tmp386, %8                   ; <i1> [#uses=1]
+  br i1 %10, label %bb72, label %read_mismatch
+
+bb72:                                             ; preds = %bb71
+  %11 = icmp eq i32 undef, %9                     ; <i1> [#uses=1]
+  br i1 %11, label %bb73, label %read_mismatch
+
+bb73:                                             ; preds = %bb72
+  call void %7(i64* null, i32 %5) nounwind
+  unreachable
+
+bb74:                                             ; preds = %bb75
+  %12 = add i32 %13, 1                            ; <i32> [#uses=1]
+  br label %bb75
+
+bb75:                                             ; preds = %bb74, %bb65
+  %13 = phi i32 [ %12, %bb74 ], [ 0, %bb65 ]      ; <i32> [#uses=2]
+  %tmp386 = add i32 0, 27328512                   ; <i32> [#uses=1]
+  %14 = shl i32 1, %13                            ; <i32> [#uses=1]
+  %15 = load i32* undef, align 4                  ; <i32> [#uses=1]
+  %16 = and i32 %15, %14                          ; <i32> [#uses=1]
+  %17 = icmp eq i32 %16, 0                        ; <i1> [#uses=1]
+  br i1 %17, label %bb74, label %bb71
+
+bb80:                                             ; preds = %bb78.preheader
+  unreachable
+
+read_fatal:                                       ; preds = %read_mismatch, %bb3.i156, %bb58
+  br i1 undef, label %return, label %bb25
+
+rewrite:                                          ; preds = %bb60, %bb51
+  store i32 -1, i32* getelementptr inbounds (%struct.__gcov_var* @__gcov_var, i32 0, i32 6), align 4
+  br i1 undef, label %bb94, label %bb119.preheader
+
+bb94:                                             ; preds = %rewrite
+  unreachable
+
+bb119.preheader:                                  ; preds = %rewrite
+  br i1 undef, label %read_mismatch, label %bb98
+
+bb98:                                             ; preds = %bb119.preheader
+  br label %read_mismatch
+
+return:                                           ; preds = %read_fatal, %entry
+  ret void
+
+bb49.1:                                           ; preds = %bb48, %bb25
+  br i1 undef, label %bb49.2, label %bb48.2
+
+bb49.2:                                           ; preds = %bb48.2, %bb49.1
+  br i1 undef, label %bb49.3, label %bb48.3
+
+bb48.2:                                           ; preds = %bb49.1
+  br label %bb49.2
+
+bb49.3:                                           ; preds = %bb48.3, %bb49.2
+  br i1 undef, label %bb51, label %bb48.4
+
+bb48.3:                                           ; preds = %bb49.2
+  br label %bb49.3
+
+bb48.4:                                           ; preds = %bb49.3
+  br label %bb51
+}
+
+declare i32 @__gcov_read_unsigned() nounwind
+
+declare void @llvm.memset.i32(i8* nocapture, i8, i32, i32) nounwind