https://bugs.llvm.org/show_bug.cgi?id=40971
Bug ID: 40971
Summary: [Coverage] Assertion when using _Pragma("unroll()")
Product: clang
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected]
// Given the following source:
typedef float float4 __attribute__((ext_vector_type(4)));
typedef float4 float4Matrix[3][3];
void foo()
{
float4Matrix K;
for (int i=0; i<3; i++)
_Pragma("unroll(3)")
for (int j=0; j<=i; j++) K[i][j]=0;
}
// End of source
when compiled with
clang -cc1 -emit-obj -target-cpu btver2 -fprofile-instrument=clang
-fcoverage-mapping <file>
gets the following compile time error:
fatal error: error in backend: File exit not handled before popRegions
When the _Pragma() is removed the compilation succeeds.
This appears to have been introduced by r229748. Note that to reproduce with
that version you have to substitute '-fprofile-instrument=clang' with
'-fprofile-instr-generate'.
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