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llvm-mirror/test/CodeGen/Mips/inlineasm-operand-code.ll
Jack Carter 7f725ae6fe Mips specific inline asm operand modifier 'M':
Print the high order register of a double word register operand.

In 32 bit mode, a 64 bit double word integer will be represented
by 2 32 bit registers. This modifier causes the high order register
to be used in the asm expression. It is useful if you are using 
doubles in assembler and continue to control register to variable
relationships.

This patch also fixes a related bug in a previous patch:

    case 'D': // Second part of a double word register operand
    case 'L': // Low order register of a double word register operand
    case 'M': // High order register of a double word register operand

I got 'D' and 'M' confused. The second part of a double word operand
will only match 'M' for one of the endianesses. I had 'L' and 'D'
be the opposite twins when 'L' and 'M' are.

llvm-svn: 160429
2012-07-18 06:41:36 +00:00

154 lines
5.4 KiB
LLVM

; Positive test for inline register constraints
;
; RUN: llc -march=mipsel < %s | FileCheck -check-prefix=CHECK_LITTLE_32 %s
; RUN: llc -march=mips < %s | FileCheck -check-prefix=CHECK_BIG_32 %s
%union.u_tag = type { i64 }
%struct.anon = type { i32, i32 }
@uval = common global %union.u_tag zeroinitializer, align 8
; X with -3
define i32 @constraint_X() nounwind {
entry:
;CHECK_LITTLE_32: constraint_X:
;CHECK_LITTLE_32: #APP
;CHECK_LITTLE_32: addi ${{[0-9]+}},${{[0-9]+}},0xfffffffffffffffd
;CHECK_LITTLE_32: #NO_APP
tail call i32 asm sideeffect "addi $0,$1,${2:X}", "=r,r,I"(i32 7, i32 -3) ;
ret i32 0
}
; x with -3
define i32 @constraint_x() nounwind {
entry:
;CHECK_LITTLE_32: constraint_x:
;CHECK_LITTLE_32: #APP
;CHECK_LITTLE_32: addi ${{[0-9]+}},${{[0-9]+}},0xfffd
;CHECK_LITTLE_32: #NO_APP
tail call i32 asm sideeffect "addi $0,$1,${2:x}", "=r,r,I"(i32 7, i32 -3) ;
ret i32 0
}
; d with -3
define i32 @constraint_d() nounwind {
entry:
;CHECK_LITTLE_32: constraint_d:
;CHECK_LITTLE_32: #APP
;CHECK_LITTLE_32: addi ${{[0-9]+}},${{[0-9]+}},-3
;CHECK_LITTLE_32: #NO_APP
tail call i32 asm sideeffect "addi $0,$1,${2:d}", "=r,r,I"(i32 7, i32 -3) ;
ret i32 0
}
; m with -3
define i32 @constraint_m() nounwind {
entry:
;CHECK_LITTLE_32: constraint_m:
;CHECK_LITTLE_32: #APP
;CHECK_LITTLE_32: addi ${{[0-9]+}},${{[0-9]+}},-4
;CHECK_LITTLE_32: #NO_APP
tail call i32 asm sideeffect "addi $0,$1,${2:m}", "=r,r,I"(i32 7, i32 -3) ;
ret i32 0
}
; z with -3
define i32 @constraint_z() nounwind {
entry:
;CHECK_LITTLE_32: constraint_z:
;CHECK_LITTLE_32: #APP
;CHECK_LITTLE_32: addi ${{[0-9]+}},${{[0-9]+}},-3
;CHECK_LITTLE_32: #NO_APP
tail call i32 asm sideeffect "addi $0,$1,${2:z}", "=r,r,I"(i32 7, i32 -3) ;
; z with 0
;CHECK_LITTLE_32: #APP
;CHECK_LITTLE_32: addi ${{[0-9]+}},${{[0-9]+}},$0
;CHECK_LITTLE_32: #NO_APP
tail call i32 asm sideeffect "addi $0,$1,${2:z}", "=r,r,I"(i32 7, i32 0) nounwind
ret i32 0
}
; a long long in 32 bit mode (use to assert)
define i32 @constraint_longlong() nounwind {
entry:
;CHECK_LITTLE_32: constraint_longlong:
;CHECK_LITTLE_32: #APP
;CHECK_LITTLE_32: addi ${{[0-9]+}},${{[0-9]+}},3
;CHECK_LITTLE_32: #NO_APP
tail call i64 asm sideeffect "addi $0,$1,$2 \0A\09", "=r,r,X"(i64 1229801703532086340, i64 3) nounwind
ret i32 0
}
; D, in little endian the source reg will be 4 bytes into the long long
define i32 @constraint_D() nounwind {
entry:
;CHECK_LITTLE_32: constraint_D:
;CHECK_LITTLE_32: lw ${{[0-9]+}}, %got(uval)(${{[0-9,a-z]+}})
;CHECK_LITTLE_32: lw $[[SECOND:[0-9]+]], 4(${{[0-9]+}})
;CHECK_LITTLE_32: lw $[[FIRST:[0-9]+]], 0(${{[0-9]+}})
;CHECK_LITTLE_32: #APP
;CHECK_LITTLE_32: or ${{[0-9]+}},$[[SECOND]],${{[0-9]+}}
;CHECK_LITTLE_32: #NO_APP
; D, in big endian the source reg will also be 4 bytes into the long long
;CHECK_BIG_32: constraint_D:
;CHECK_BIG_32: lw ${{[0-9]+}}, %got(uval)(${{[0-9,a-z]+}})
;CHECK_BIG_32: lw $[[SECOND:[0-9]+]], 4(${{[0-9]+}})
;CHECK_BIG_32: lw $[[FIRST:[0-9]+]], 0(${{[0-9]+}})
;CHECK_BIG_32: #APP
;CHECK_BIG_32: or ${{[0-9]+}},$[[SECOND]],${{[0-9]+}}
;CHECK_BIG_32: #NO_APP
%bosco = load i64* getelementptr inbounds (%union.u_tag* @uval, i32 0, i32 0), align 8
%trunc1 = trunc i64 %bosco to i32
tail call i32 asm sideeffect "or $0,${1:D},$2", "=r,r,r"(i64 %bosco, i32 %trunc1) nounwind
ret i32 0
}
; L, in little endian the source reg will be 0 bytes into the long long
define i32 @constraint_L() nounwind {
entry:
;CHECK_LITTLE_32: constraint_L:
;CHECK_LITTLE_32: lw ${{[0-9]+}}, %got(uval)(${{[0-9,a-z]+}})
;CHECK_LITTLE_32: lw $[[SECOND:[0-9]+]], 4(${{[0-9]+}})
;CHECK_LITTLE_32: lw $[[FIRST:[0-9]+]], 0(${{[0-9]+}})
;CHECK_LITTLE_32: #APP
;CHECK_LITTLE_32: or ${{[0-9]+}},$[[FIRST]],${{[0-9]+}}
;CHECK_LITTLE_32: #NO_APP
; L, in big endian the source reg will be 4 bytes into the long long
;CHECK_BIG_32: constraint_L:
;CHECK_BIG_32: lw ${{[0-9]+}}, %got(uval)(${{[0-9,a-z]+}})
;CHECK_BIG_32: lw $[[SECOND:[0-9]+]], 4(${{[0-9]+}})
;CHECK_BIG_32: lw $[[FIRST:[0-9]+]], 0(${{[0-9]+}})
;CHECK_BIG_32: #APP
;CHECK_BIG_32: or ${{[0-9]+}},$[[SECOND]],${{[0-9]+}}
;CHECK_BIG_32: #NO_APP
%bosco = load i64* getelementptr inbounds (%union.u_tag* @uval, i32 0, i32 0), align 8
%trunc1 = trunc i64 %bosco to i32
tail call i32 asm sideeffect "or $0,${1:L},$2", "=r,r,r"(i64 %bosco, i32 %trunc1) nounwind
ret i32 0
}
; M, in little endian the source reg will be 4 bytes into the long long
define i32 @constraint_M() nounwind {
entry:
;CHECK_LITTLE_32: constraint_M:
;CHECK_LITTLE_32: lw ${{[0-9]+}}, %got(uval)(${{[0-9,a-z]+}})
;CHECK_LITTLE_32: lw $[[SECOND:[0-9]+]], 4(${{[0-9]+}})
;CHECK_LITTLE_32: lw $[[FIRST:[0-9]+]], 0(${{[0-9]+}})
;CHECK_LITTLE_32: #APP
;CHECK_LITTLE_32: or ${{[0-9]+}},$[[SECOND]],${{[0-9]+}}
;CHECK_LITTLE_32: #NO_APP
; M, in big endian the source reg will be 0 bytes into the long long
;CHECK_BIG_32: constraint_M:
;CHECK_BIG_32: lw ${{[0-9]+}}, %got(uval)(${{[0-9,a-z]+}})
;CHECK_BIG_32: lw $[[SECOND:[0-9]+]], 4(${{[0-9]+}})
;CHECK_BIG_32: lw $[[FIRST:[0-9]+]], 0(${{[0-9]+}})
;CHECK_BIG_32: #APP
;CHECK_BIG_32: or ${{[0-9]+}},$[[FIRST]],${{[0-9]+}}
;CHECK_BIG_32: #NO_APP
%bosco = load i64* getelementptr inbounds (%union.u_tag* @uval, i32 0, i32 0), align 8
%trunc1 = trunc i64 %bosco to i32
tail call i32 asm sideeffect "or $0,${1:M},$2", "=r,r,r"(i64 %bosco, i32 %trunc1) nounwind
ret i32 0
}