https://llvm.org/bugs/show_bug.cgi?id=24004
Bug ID: 24004
Summary: [OpenCL] Produces illegal address space conversions
for automatic local struct arrays
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Related pocl bug: https://github.com/pocl/pocl/issues/195
Reproduce with a scan.cl:
typedef struct {
int c00;
int c01;
} scan_t;
scan_t add(scan_t a, scan_t b)
{
return b;
}
kernel
void scan_scan_intervals_lev1()
{
local scan_t psc_ldata[2];
psc_ldata[0] = add(psc_ldata[0], psc_ldata[1]);
}
clang -Xclang -ffake-address-space-map -x cl scan.cl -emit-llvm -c -S -o -
This either crashes with an assertion (in case Clang built with assertions) or
generates an illegal bitcast between address spaceslike this:
%1 = load i64* bitcast (%struct.scan_t addrspace(2)* getelementptr inbounds ([2
x %struct.scan_t] addrspace(2)* @scan_scan_intervals_lev1.psc_ldata, i64 0, i64
1) to i6
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