404071b059
This patch preserves `undef` SDNodes that are `volatile` qualified. Previously, these nodes would be discarded. The motivation behind this change is to adhere to the [LangRef](https://llvm.org/docs/LangRef.html#volatile-memory-accesses), even though that doc is mostly in terms of LLVM-IR, it seems reasonable to imply that the volatile constraints also imply to SDNodes. > Certain memory accesses, such as [load](https://llvm.org/docs/LangRef.html#i-load)’s, [store](https://llvm.org/docs/LangRef.html#i-store)’s, and [llvm.memcpy](https://llvm.org/docs/LangRef.html#int-memcpy)’s may be marked volatile. The optimizers must not change the number of volatile operations or change their order of execution relative to other volatile operations. The optimizers may change the order of volatile operations relative to non-volatile operations. This is not Java’s “volatile” and has no cross-thread synchronization behavior. Source: https://llvm.org/docs/LangRef.html#volatile-memory-accesses
74 lines
3.3 KiB
LLVM
74 lines
3.3 KiB
LLVM
; RUN: not llc -mtriple=r600 < %s 2>&1 | FileCheck -check-prefix=ERROR %s
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; RUN: llc -mtriple=amdgcn < %s | FileCheck -check-prefix=GCN %s
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declare hidden i32 @memcmp(ptr addrspace(1) readonly nocapture, ptr addrspace(1) readonly nocapture, i64) #0
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declare hidden ptr addrspace(1) @memchr(ptr addrspace(1) readonly nocapture, i32, i64) #1
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declare hidden ptr @strcpy(ptr nocapture, ptr readonly nocapture) #0
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declare hidden i32 @strlen(ptr nocapture) #1
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declare hidden i32 @strnlen(ptr nocapture, i32) #1
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declare hidden i32 @strcmp(ptr nocapture, ptr nocapture) #1
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; ERROR: error: <unknown>:0:0: in function test_memcmp void (ptr addrspace(1), ptr addrspace(1), ptr, ptr addrspace(1)): unsupported call to function memcmp
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; GCN: s_add_u32 s{{[0-9]+}}, s{{[0-9]+}}, memcmp@rel32@lo+4
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; GCN: s_addc_u32 s{{[0-9]+}}, s{{[0-9]+}}, memcmp@rel32@hi+12
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define amdgpu_kernel void @test_memcmp(ptr addrspace(1) %x, ptr addrspace(1) %y, ptr nocapture %p, ptr addrspace(1) %out) #0 {
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entry:
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%cmp = tail call i32 @memcmp(ptr addrspace(1) %x, ptr addrspace(1) %y, i64 2)
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store i32 %cmp, ptr addrspace(1) %out
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ret void
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}
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; ERROR: error: <unknown>:0:0: in function test_memchr void (ptr addrspace(1), i32, i64, ptr addrspace(1)): unsupported call to function memchr
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; GCN: s_add_u32 s{{[0-9]+}}, s{{[0-9]+}}, memchr@rel32@lo+4
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; GCN: s_addc_u32 s{{[0-9]+}}, s{{[0-9]+}}, memchr@rel32@hi+12
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define amdgpu_kernel void @test_memchr(ptr addrspace(1) %src, i32 %char, i64 %len, ptr addrspace(1) %out) #0 {
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%res = call ptr addrspace(1) @memchr(ptr addrspace(1) %src, i32 %char, i64 %len)
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store ptr addrspace(1) %res, ptr addrspace(1) %out
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ret void
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}
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; ERROR: error: <unknown>:0:0: in function test_strcpy void (ptr, ptr, ptr addrspace(1)): unsupported call to function strcpy
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; GCN: s_add_u32 s{{[0-9]+}}, s{{[0-9]+}}, strcpy@rel32@lo+4
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; GCN: s_addc_u32 s{{[0-9]+}}, s{{[0-9]+}}, strcpy@rel32@hi+12
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define amdgpu_kernel void @test_strcpy(ptr %dst, ptr %src, ptr addrspace(1) %out) #0 {
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%res = call ptr @strcpy(ptr %dst, ptr %src)
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store ptr %res, ptr addrspace(1) %out
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ret void
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}
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; ERROR: error: <unknown>:0:0: in function test_strcmp void (ptr, ptr, ptr addrspace(1)): unsupported call to function strcmp
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; GCN: s_add_u32 s{{[0-9]+}}, s{{[0-9]+}}, strcmp@rel32@lo+4
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; GCN: s_addc_u32 s{{[0-9]+}}, s{{[0-9]+}}, strcmp@rel32@hi+12
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define amdgpu_kernel void @test_strcmp(ptr %src0, ptr %src1, ptr addrspace(1) %out) #0 {
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%res = call i32 @strcmp(ptr %src0, ptr %src1)
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store i32 %res, ptr addrspace(1) %out
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ret void
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}
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; ERROR: error: <unknown>:0:0: in function test_strlen void (ptr, ptr addrspace(1)): unsupported call to function strlen
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; GCN: s_add_u32 s{{[0-9]+}}, s{{[0-9]+}}, strlen@rel32@lo+4
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; GCN: s_addc_u32 s{{[0-9]+}}, s{{[0-9]+}}, strlen@rel32@hi+12
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define amdgpu_kernel void @test_strlen(ptr %src, ptr addrspace(1) %out) #0 {
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%res = call i32 @strlen(ptr %src)
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store i32 %res, ptr addrspace(1) %out
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ret void
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}
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; ERROR: error: <unknown>:0:0: in function test_strnlen void (ptr, i32, ptr addrspace(1)): unsupported call to function strnlen
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; GCN: s_add_u32 s{{[0-9]+}}, s{{[0-9]+}}, strnlen@rel32@lo+4
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; GCN: s_addc_u32 s{{[0-9]+}}, s{{[0-9]+}}, strnlen@rel32@hi+12
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define amdgpu_kernel void @test_strnlen(ptr %src, i32 %size, ptr addrspace(1) %out) #0 {
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%res = call i32 @strnlen(ptr %src, i32 %size)
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store i32 %res, ptr addrspace(1) %out
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ret void
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}
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attributes #0 = { nounwind }
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