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96a36017f7
Previously, when the following piece of code was compiled, clang would
incorrectly warn that the size of "wide_two" does not match register size
specified by the constraint and modifier":
long wide_two = two;
asm ("%w0 %1" : "+r" (one), "+r"(wide_two));
This was caused by a miscalculation of ConstraintIdx in Sema::ActOnGCCAsmStmt.
This commit fixes PR21270 and rdar://problem/18668354.
llvm-svn: 228089
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
// RUN: %clang_cc1 -triple arm64-apple-darwin -fsyntax-only -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
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typedef unsigned char uint8_t;
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uint8_t constraint_r(uint8_t *addr) {
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uint8_t byte;
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__asm__ volatile("ldrb %0, [%1]" : "=r" (byte) : "r" (addr) : "memory");
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// CHECK: warning: value size does not match register size specified by the constraint and modifier
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// CHECK: note: use constraint modifier "w"
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// CHECK: fix-it:{{.*}}:{8:26-8:28}:"%w0"
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return byte;
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}
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uint8_t constraint_r_symbolic(uint8_t *addr) {
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uint8_t byte;
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__asm__ volatile("ldrb %[s0], [%[s1]]" : [s0] "=r" (byte) : [s1] "r" (addr) : "memory");
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// CHECK: warning: value size does not match register size specified by the constraint and modifier
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// CHECK: note: use constraint modifier "w"
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// CHECK: fix-it:{{.*}}:{19:26-19:31}:"%w[s0]"
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return byte;
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}
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#define PERCENT "%"
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uint8_t constraint_r_symbolic_macro(uint8_t *addr) {
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uint8_t byte;
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__asm__ volatile("ldrb "PERCENT"[s0], [%[s1]]" : [s0] "=r" (byte) : [s1] "r" (addr) : "memory");
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// CHECK: warning: value size does not match register size specified by the constraint and modifier
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// CHECK: note: use constraint modifier "w"
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// CHECK-NOT: fix-it
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return byte;
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}
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// CHECK: warning: value size does not match register size specified by the constraint and modifier
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// CHECK: asm ("%w0 %w1 %2" : "+r" (one) : "r" (wide_two));
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// CHECK: note: use constraint modifier "w"
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// CHECK: fix-it:{{.*}}:{47:17-47:19}:"%w2"
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void read_write_modifier0(int one, int two) {
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long wide_two = two;
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asm ("%w0 %w1 %2" : "+r" (one) : "r" (wide_two));
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}
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// CHECK-NOT: warning:
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void read_write_modifier1(int one, int two) {
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long wide_two = two;
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asm ("%w0 %1" : "+r" (one), "+r" (wide_two));
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}
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