[AMDGPU][MC] v_interp tests to check reported operands.

[kosarev]

Summary

For these tests we want to make sure the reported operands are the
expected ones.

[foad]

I think this is fine. Another approach used in *_err_pos.s is to run FileCheck -strict-whitespace and check for the exact location of the error caret ^.

llvm/test/MC/AMDGPU/gfx11_asm_vinterp_err.s

 // RUN: not llvm-mc -arch=amdgcn -mcpu=gfx1100 %s 2>&1 | FileCheck %s -check-prefix=GFX11-ERR --implicit-check-not=error: --strict-whitespace
 
 //===----------------------------------------------------------------------===//
 // VINTERP src operands must be VGPRs.
 // Check that other operand kinds are rejected by assembler.
 //===----------------------------------------------------------------------===//
 
 v_interp_p10_f32 v0, s1, v2, v3
-// GFX11-ERR: :[[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// GFX11-ERR: :[[@LINE-1]]:22: error: invalid operand for instruction
 
 v_interp_p10_f32 v0, v1, s2, v3
-// GFX11-ERR: :[[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// GFX11-ERR: :[[@LINE-1]]:26: error: invalid operand for instruction
 
 v_interp_p10_f32 v0, v1, v2, s3
-// GFX11-ERR: :[[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// GFX11-ERR: :[[@LINE-1]]:30: error: invalid operand for instruction
 
 v_interp_p2_f32 v0, 1, v2, v3
-// GFX11-ERR: :[[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// GFX11-ERR: :[[@LINE-1]]:21: error: invalid operand for instruction
 
 v_interp_p2_f32 v0, v1, 2, v3
-// GFX11-ERR: :[[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// GFX11-ERR: :[[@LINE-1]]:25: error: invalid operand for instruction
 
 v_interp_p2_f32 v0, v1, v2, 3
-// GFX11-ERR: :[[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// GFX11-ERR: :[[@LINE-1]]:29: error: invalid operand for instruction
 
 v_interp_p10_f16_f32 v0, s1, v2, v3
-// GFX11-ERR: :[[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// GFX11-ERR: :[[@LINE-1]]:26: error: invalid operand for instruction
 
 v_interp_p10_f16_f32 v0, v1, s2, v3
-// GFX11-ERR: :[[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// GFX11-ERR: :[[@LINE-1]]:30: error: invalid operand for instruction
 
 v_interp_p10_f16_f32 v0, v1, v2, s3
-// GFX11-ERR: :[[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// GFX11-ERR: :[[@LINE-1]]:34: error: invalid operand for instruction
 
 v_interp_p2_f16_f32 v0, 1, v2, v3
-// GFX11-ERR: :[[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// GFX11-ERR: :[[@LINE-1]]:25: error: invalid operand for instruction
 
 v_interp_p2_f16_f32 v0, v1, 2, v3
-// GFX11-ERR: :[[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// GFX11-ERR: :[[@LINE-1]]:29: error: invalid operand for instruction
 
 v_interp_p2_f16_f32 v0, v1, v2, 3
-// GFX11-ERR: :[[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// GFX11-ERR: :[[@LINE-1]]:33: error: invalid operand for instruction