fix bug with investigating types in the main pass, and in rare cases defining types with incorrect data because of that

1 files changed, 33 insertions, 0 deletions

diff --git a/tests/cases/trace.ll b/tests/cases/trace.ll
new file mode 100644
index 00000000..1bada3e9
--- /dev/null
+++ b/tests/cases/trace.ll
@@ -0,0 +1,33 @@
+; ModuleID = 'tests/hello_world.bc'
+
+; A [block] type is used in a function def here. If we investigate types in the very first pass, we will
+; make a bad guess as to the size - we assume undef'd types are [int32]. For this code to compile, we must
+; only investigate in the first side pass, which is correct since there the type defs are handled.
+
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32-S128"
+target triple = "i386-pc-linux-gnu"
+
+%struct.TraceKindPair = type { i8*, i32 }
+
+@_ZL14traceKindNames = internal constant [4 x %struct.TraceKindPair] [%struct.TraceKindPair { i8* getelementptr inbounds ([15 x i8]* @.str, i32 0, i32 0), i32 -1 }, %struct.TraceKindPair { i8* getelementptr inbounds ([15 x i8]* @.str, i32 0, i32 0), i32 0 }, %struct.TraceKindPair { i8* getelementptr inbounds ([15 x i8]* @.str, i32 0, i32 0), i32 1 }, %struct.TraceKindPair { i8* getelementptr inbounds ([15 x i8]* @.str, i32 0, i32 0), i32 3 }], align 4 ; [#uses=3 type=[4 x %struct.TraceKindPair]*]
+
+@.str = private unnamed_addr constant [15 x i8] c"hello, world!\0A\00", align 1 ; [#uses=1 type=[15 x i8]*]
+
+define linkonce_odr hidden i32 @_ZN7mozilla11ArrayLengthIK13TraceKindPairLj4EEEjRAT0__T_([4 x %struct.TraceKindPair]* %arr) nounwind {
+entry:
+  ret i32 1
+}
+
+; [#uses=0]
+define i32 @main() {
+entry:
+  %retval = alloca i32, align 4                   ; [#uses=1 type=i32*]
+  store i32 0, i32* %retval
+  %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([15 x i8]* @.str, i32 0, i32 0)) ; [#uses=0 type=i32]
+  %0 = getelementptr inbounds [4 x %struct.TraceKindPair]* @_ZL14traceKindNames, i32 0, i32 1; [#uses=1 type=%struct.TraceKindPair*] [debug line = 1473:17]
+  %1 = getelementptr inbounds %struct.TraceKindPair* %0, i32 0, i32 0 ; [#uses=1 type=i8**] [debug line = 1473:17]
+  ret i32 1
+}
+
+; [#uses=1]
+declare i32 @printf(i8*, ...)