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llvm-6502/test/CodeGen/Mips/cmov.ll
Chandler Carruth d24d326705 [SDAG] Introduce a combined set to the DAG combiner which tracks nodes 
which have successfully round-tripped through the combine phase, and use
this to ensure all operands to DAG nodes are visited by the combiner,
even if they are only added during the combine phase.

This is critical to have the combiner reach nodes that are *introduced*
during combining. Previously these would sometimes be visited and
sometimes not be visited based on whether they happened to end up on the
worklist or not. Now we always run them through the combiner.

This fixes quite a few bad codegen test cases lurking in the suite while
also being more principled. Among these, the TLS codegeneration is
particularly exciting for programs that have this in the critical path
like TSan-instrumented binaries (although I think they engineer to use
a different TLS that is faster anyways).

I've tried to check for compile-time regressions here by running llc
over a merged (but not LTO-ed) clang bitcode file and observed at most
a 3% slowdown in llc. Given that this is essentially a worst case (none
of opt or clang are running at this phase) I think this is tolerable.
The actual LTO case should be even less costly, and the cost in normal
compilation should be negligible.

With this combining logic, it is possible to re-legalize as we combine
which is necessary to implement PSHUFB formation on x86 as
a post-legalize DAG combine (my ultimate goal).

Differential Revision: http://reviews.llvm.org/D4638

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213898 91177308-0d34-0410-b5e6-96231b3b80d8
2014-07-24 22:15:28 +00:00

766 lines
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LLVM
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; RUN: llc -march=mips -mcpu=mips32 < %s | FileCheck %s -check-prefix=ALL -check-prefix=32-CMOV
; RUN: llc -march=mips -mcpu=mips32 -regalloc=basic < %s | FileCheck %s -check-prefix=ALL -check-prefix=32-CMOV
; RUN: llc -march=mips -mcpu=mips32r2 < %s | FileCheck %s -check-prefix=ALL -check-prefix=32-CMOV
; RUN: llc -march=mips -mcpu=mips32r6 < %s | FileCheck %s -check-prefix=ALL -check-prefix=32-CMP
; RUN: llc -march=mips64el -mcpu=mips4 < %s | FileCheck %s -check-prefix=ALL -check-prefix=64-CMOV
; RUN: llc -march=mips64el -mcpu=mips64 < %s | FileCheck %s -check-prefix=ALL -check-prefix=64-CMOV
; RUN: llc -march=mips64el -mcpu=mips64r6 < %s | FileCheck %s -check-prefix=ALL -check-prefix=64-CMP
@i1 = global [3 x i32] [i32 1, i32 2, i32 3], align 4
@i3 = common global i32* null, align 4
; ALL-LABEL: cmov1:
; 32-CMOV-DAG: lw $[[R0:[0-9]+]], %got(i3)
; 32-CMOV-DAG: addiu $[[R1:[0-9]+]], ${{[0-9]+}}, %got(i1)
; 32-CMOV-DAG: movn $[[R0]], $[[R1]], $4
; 32-CMOV-DAG: lw $2, 0($[[R0]])
; 32-CMP-DAG: lw $[[R0:[0-9]+]], %got(i3)
; 32-CMP-DAG: addiu $[[R1:[0-9]+]], ${{[0-9]+}}, %got(i1)
; 32-CMP-DAG: selnez $[[T0:[0-9]+]], $[[R1]], $4
; 32-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[R0]], $4
; 32-CMP-DAG: or $[[T2:[0-9]+]], $[[T0]], $[[T1]]
; 32-CMP-DAG: lw $2, 0($[[T2]])
; 64-CMOV-DAG: ldr $[[R0:[0-9]+]]
; 64-CMOV-DAG: ld $[[R1:[0-9]+]], %got_disp(i1)
; 64-CMOV-DAG: movn $[[R0]], $[[R1]], $4
; 64-CMP-DAG: ld $[[R0:[0-9]+]], %got_disp(i3)(
; 64-CMP-DAG: daddiu $[[R1:[0-9]+]], ${{[0-9]+}}, %got_disp(i1)
; FIXME: This sll works around an implementation detail in the code generator
; (setcc's result is i32 so bits 32-63 are undefined). It's not really
; needed.
; 64-CMP-DAG: sll $[[CC:[0-9]+]], $4, 0
; 64-CMP-DAG: selnez $[[T0:[0-9]+]], $[[R1]], $[[CC]]
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[R0]], $[[CC]]
; 64-CMP-DAG: or $[[T2:[0-9]+]], $[[T0]], $[[T1]]
; 64-CMP-DAG: ld $2, 0($[[T2]])
define i32* @cmov1(i32 %s) nounwind readonly {
entry:
%tobool = icmp ne i32 %s, 0
%tmp1 = load i32** @i3, align 4
%cond = select i1 %tobool, i32* getelementptr inbounds ([3 x i32]* @i1, i32 0, i32 0), i32* %tmp1
ret i32* %cond
}
@c = global i32 1, align 4
@d = global i32 0, align 4
; ALL-LABEL: cmov2:
; 32-CMOV-DAG: addiu $[[R1:[0-9]+]], ${{[0-9]+}}, %got(d)
; 32-CMOV-DAG: addiu $[[R0:[0-9]+]], ${{[0-9]+}}, %got(c)
; 32-CMOV-DAG: movn $[[R1]], $[[R0]], $4
; 32-CMOV-DAG: lw $2, 0($[[R0]])
; 32-CMP-DAG: addiu $[[R1:[0-9]+]], ${{[0-9]+}}, %got(d)
; 32-CMP-DAG: addiu $[[R0:[0-9]+]], ${{[0-9]+}}, %got(c)
; 32-CMP-DAG: selnez $[[T0:[0-9]+]], $[[R0]], $4
; 32-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[R1]], $4
; 32-CMP-DAG: or $[[T2:[0-9]+]], $[[T0]], $[[T1]]
; 32-CMP-DAG: lw $2, 0($[[T2]])
; 64-CMOV: daddiu $[[R1:[0-9]+]], ${{[0-9]+}}, %got_disp(d)
; 64-CMOV: daddiu $[[R0:[0-9]+]], ${{[0-9]+}}, %got_disp(c)
; 64-CMOV: movn $[[R1]], $[[R0]], $4
; 64-CMP-DAG: daddiu $[[R1:[0-9]+]], ${{[0-9]+}}, %got_disp(d)
; 64-CMP-DAG: daddiu $[[R0:[0-9]+]], ${{[0-9]+}}, %got_disp(c)
; FIXME: This sll works around an implementation detail in the code generator
; (setcc's result is i32 so bits 32-63 are undefined). It's not really
; needed.
; 64-CMP-DAG: sll $[[CC:[0-9]+]], $4, 0
; 64-CMP-DAG: selnez $[[T0:[0-9]+]], $[[R0]], $[[CC]]
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[R1]], $[[CC]]
; 64-CMP-DAG: or $[[T2:[0-9]+]], $[[T0]], $[[T1]]
; 64-CMP-DAG: lw $2, 0($[[T2]])
define i32 @cmov2(i32 %s) nounwind readonly {
entry:
%tobool = icmp ne i32 %s, 0
%tmp1 = load i32* @c, align 4
%tmp2 = load i32* @d, align 4
%cond = select i1 %tobool, i32 %tmp1, i32 %tmp2
ret i32 %cond
}
; ALL-LABEL: cmov3:
; We won't check the result register since we can't know if the move is first
; or last. We do know it will be either one of two registers so we can at least
; check that.
; 32-CMOV: xori $[[R0:[0-9]+]], $4, 234
; 32-CMOV: movz ${{[26]}}, $5, $[[R0]]
; 32-CMP-DAG: xori $[[CC:[0-9]+]], $4, 234
; 32-CMP-DAG: seleqz $[[T0:[0-9]+]], $5, $[[CC]]
; 32-CMP-DAG: selnez $[[T1:[0-9]+]], $6, $[[CC]]
; 32-CMP-DAG: or $2, $[[T0]], $[[T1]]
; 64-CMOV: xori $[[R0:[0-9]+]], $4, 234
; 64-CMOV: movz ${{[26]}}, $5, $[[R0]]
; 64-CMP-DAG: xori $[[CC:[0-9]+]], $4, 234
; 64-CMP-DAG: seleqz $[[T0:[0-9]+]], $5, $[[CC]]
; 64-CMP-DAG: selnez $[[T1:[0-9]+]], $6, $[[CC]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @cmov3(i32 %a, i32 %b, i32 %c) nounwind readnone {
entry:
%cmp = icmp eq i32 %a, 234
%cond = select i1 %cmp, i32 %b, i32 %c
ret i32 %cond
}
; ALL-LABEL: cmov3_ne:
; We won't check the result register since we can't know if the move is first
; or last. We do know it will be either one of two registers so we can at least
; check that.
; FIXME: Use xori instead of addiu+xor.
; 32-CMOV: addiu $[[R0:[0-9]+]], $zero, 234
; 32-CMOV: xor $[[R1:[0-9]+]], $4, $[[R0]]
; 32-CMOV: movn ${{[26]}}, $5, $[[R1]]
; 32-CMP-DAG: xori $[[CC:[0-9]+]], $4, 234
; 32-CMP-DAG: selnez $[[T0:[0-9]+]], $5, $[[CC]]
; 32-CMP-DAG: seleqz $[[T1:[0-9]+]], $6, $[[CC]]
; 32-CMP-DAG: or $2, $[[T0]], $[[T1]]
; FIXME: Use xori instead of addiu+xor.
; 64-CMOV: addiu $[[R0:[0-9]+]], $zero, 234
; 64-CMOV: xor $[[R1:[0-9]+]], $4, $[[R0]]
; 64-CMOV: movn ${{[26]}}, $5, $[[R1]]
; 64-CMP-DAG: xori $[[CC:[0-9]+]], $4, 234
; 64-CMP-DAG: selnez $[[T0:[0-9]+]], $5, $[[CC]]
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $6, $[[CC]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @cmov3_ne(i32 %a, i32 %b, i32 %c) nounwind readnone {
entry:
%cmp = icmp ne i32 %a, 234
%cond = select i1 %cmp, i32 %b, i32 %c
ret i32 %cond
}
; ALL-LABEL: cmov4:
; We won't check the result register since we can't know if the move is first
; or last. We do know it will be one of two registers so we can at least check
; that.
; 32-CMOV-DAG: xori $[[R0:[0-9]+]], $4, 234
; 32-CMOV-DAG: lw $[[R1:2]], 16($sp)
; 32-CMOV-DAG: lw $[[R2:3]], 20($sp)
; 32-CMOV-DAG: movz $[[R1]], $6, $[[R0]]
; 32-CMOV-DAG: movz $[[R2]], $7, $[[R0]]
; 32-CMP-DAG: xori $[[R0:[0-9]+]], $4, 234
; 32-CMP-DAG: lw $[[R1:[0-9]+]], 16($sp)
; 32-CMP-DAG: lw $[[R2:[0-9]+]], 20($sp)
; 32-CMP-DAG: seleqz $[[T0:[0-9]+]], $6, $[[R0]]
; 32-CMP-DAG: seleqz $[[T1:[0-9]+]], $7, $[[R0]]
; 32-CMP-DAG: selnez $[[T2:[0-9]+]], $[[R1]], $[[R0]]
; 32-CMP-DAG: selnez $[[T3:[0-9]+]], $[[R2]], $[[R0]]
; 32-CMP-DAG: or $2, $[[T0]], $[[T2]]
; 32-CMP-DAG: or $3, $[[T1]], $[[T3]]
; 64-CMOV: xori $[[R0:[0-9]+]], $4, 234
; 64-CMOV: movz ${{[26]}}, $5, $[[R0]]
; 64-CMP-DAG: xori $[[R0:[0-9]+]], $4, 234
; 64-CMP-DAG: seleqz $[[T0:[0-9]+]], $5, $[[R0]]
; 64-CMP-DAG: selnez $[[T1:[0-9]+]], $6, $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i64 @cmov4(i32 %a, i64 %b, i64 %c) nounwind readnone {
entry:
%cmp = icmp eq i32 %a, 234
%cond = select i1 %cmp, i64 %b, i64 %c
ret i64 %cond
}
; ALL-LABEL: cmov4_ne:
; We won't check the result register since we can't know if the move is first
; or last. We do know it will be one of two registers so we can at least check
; that.
; FIXME: Use xori instead of addiu+xor.
; 32-CMOV-DAG: addiu $[[R0:[0-9]+]], $zero, 234
; 32-CMOV-DAG: xor $[[R1:[0-9]+]], $4, $[[R0]]
; 32-CMOV-DAG: lw $[[R2:2]], 16($sp)
; 32-CMOV-DAG: lw $[[R3:3]], 20($sp)
; 32-CMOV-DAG: movn $[[R2]], $6, $[[R1]]
; 32-CMOV-DAG: movn $[[R3]], $7, $[[R1]]
; 32-CMP-DAG: xori $[[R0:[0-9]+]], $4, 234
; 32-CMP-DAG: lw $[[R1:[0-9]+]], 16($sp)
; 32-CMP-DAG: lw $[[R2:[0-9]+]], 20($sp)
; 32-CMP-DAG: selnez $[[T0:[0-9]+]], $6, $[[R0]]
; 32-CMP-DAG: selnez $[[T1:[0-9]+]], $7, $[[R0]]
; 32-CMP-DAG: seleqz $[[T2:[0-9]+]], $[[R1]], $[[R0]]
; 32-CMP-DAG: seleqz $[[T3:[0-9]+]], $[[R2]], $[[R0]]
; 32-CMP-DAG: or $2, $[[T0]], $[[T2]]
; 32-CMP-DAG: or $3, $[[T1]], $[[T3]]
; FIXME: Use xori instead of addiu+xor.
; 64-CMOV: addiu $[[R0:[0-9]+]], $zero, 234
; 64-CMOV: xor $[[R1:[0-9]+]], $4, $[[R0]]
; 64-CMOV: movn ${{[26]}}, $5, $[[R1]]
; 64-CMP-DAG: xori $[[R0:[0-9]+]], $4, 234
; 64-CMP-DAG: selnez $[[T0:[0-9]+]], $5, $[[R0]]
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $6, $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i64 @cmov4_ne(i32 %a, i64 %b, i64 %c) nounwind readnone {
entry:
%cmp = icmp ne i32 %a, 234
%cond = select i1 %cmp, i64 %b, i64 %c
ret i64 %cond
}
; slti and conditional move.
;
; Check that, pattern
; (select (setgt a, N), t, f)
; turns into
; (movz t, (setlt a, N + 1), f)
; if N + 1 fits in 16-bit.
; ALL-LABEL: slti0:
; 32-CMOV-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 32-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 32-CMOV-DAG: slti $[[R0:[0-9]+]], $4, 32767
; 32-CMOV-DAG: movz $[[I5]], $[[I3]], $[[R0]]
; 32-CMP-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 32-CMP-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 32-CMP-DAG: slti $[[R0:[0-9]+]], $4, 32767
; FIXME: We can do better than this by using selccz to choose between +0 and +2
; 32-CMP-DAG: seleqz $[[T0:[0-9]+]], $[[I3]], $[[R0]]
; 32-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 32-CMP-DAG: or $2, $[[T0]], $[[T1]]
; 64-CMOV-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 64-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 64-CMOV-DAG: slti $[[R0:[0-9]+]], $4, 32767
; 64-CMOV-DAG: movz $[[I5]], $[[I3]], $[[R0]]
; 64-CMP-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 64-CMP-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 64-CMP-DAG: slti $[[R0:[0-9]+]], $4, 32767
; FIXME: We can do better than this by using selccz to choose between +0 and +2
; 64-CMP-DAG: seleqz $[[T0:[0-9]+]], $[[I3]], $[[R0]]
; 64-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @slti0(i32 %a) {
entry:
%cmp = icmp sgt i32 %a, 32766
%cond = select i1 %cmp, i32 3, i32 5
ret i32 %cond
}
; ALL-LABEL: slti1:
; 32-CMOV-DAG: addiu $[[I7:[0-9]+]], $zero, 7
; 32-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 32-CMOV-DAG: addiu $[[R1:[0-9]+]], $zero, 32767
; 32-CMOV-DAG: slt $[[R0:[0-9]+]], $[[R1]], $4
; 32-CMOV-DAG: movn $[[I5]], $[[I7]], $[[R0]]
; 32-CMP-DAG: addiu $[[I7:[0-9]+]], $zero, 7
; 32-CMP-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 32-CMP-DAG: addiu $[[I32767:[0-9]+]], $zero, 32767
; 32-CMP-DAG: slt $[[R0:[0-9]+]], $[[I32767]], $4
; FIXME: We can do better than this by using selccz to choose between -0 and -2
; 32-CMP-DAG: selnez $[[T0:[0-9]+]], $[[I7]], $[[R0]]
; 32-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 32-CMP-DAG: or $2, $[[T0]], $[[T1]]
; 64-CMOV-DAG: addiu $[[I7:[0-9]+]], $zero, 7
; 64-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 64-CMOV-DAG: addiu $[[R1:[0-9]+]], $zero, 32767
; 64-CMOV-DAG: slt $[[R0:[0-9]+]], $[[R1]], $4
; 64-CMOV-DAG: movn $[[I5]], $[[I7]], $[[R0]]
; 64-CMP-DAG: addiu $[[I7:[0-9]+]], $zero, 7
; 64-CMP-DAG: addiu $[[I5:2]], $zero, 5
; 64-CMP-DAG: addiu $[[R1:[0-9]+]], $zero, 32767
; 64-CMP-DAG: slt $[[R0:[0-9]+]], $[[R1]], $4
; FIXME: We can do better than this by using selccz to choose between -0 and -2
; 64-CMP-DAG: selnez $[[T0:[0-9]+]], $[[I7]], $[[R0]]
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @slti1(i32 %a) {
entry:
%cmp = icmp sgt i32 %a, 32767
%cond = select i1 %cmp, i32 7, i32 5
ret i32 %cond
}
; ALL-LABEL: slti2:
; 32-CMOV-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 32-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 32-CMOV-DAG: slti $[[R0:[0-9]+]], $4, -32768
; 32-CMOV-DAG: movz $[[I5]], $[[I3]], $[[R0]]
; 32-CMP-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 32-CMP-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 32-CMP-DAG: slti $[[R0:[0-9]+]], $4, -32768
; FIXME: We can do better than this by using selccz to choose between +0 and +2
; 32-CMP-DAG: seleqz $[[T0:[0-9]+]], $[[I3]], $[[R0]]
; 32-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 32-CMP-DAG: or $2, $[[T0]], $[[T1]]
; 64-CMOV-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 64-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 64-CMOV-DAG: slti $[[R0:[0-9]+]], $4, -32768
; 64-CMOV-DAG: movz $[[I5]], $[[I3]], $[[R0]]
; 64-CMP-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 64-CMP-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 64-CMP-DAG: slti $[[R0:[0-9]+]], $4, -32768
; FIXME: We can do better than this by using selccz to choose between +0 and +2
; 64-CMP-DAG: seleqz $[[T0:[0-9]+]], $[[I3]], $[[R0]]
; 64-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @slti2(i32 %a) {
entry:
%cmp = icmp sgt i32 %a, -32769
%cond = select i1 %cmp, i32 3, i32 5
ret i32 %cond
}
; ALL-LABEL: slti3:
; 32-CMOV-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 32-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 32-CMOV-DAG: lui $[[R1:[0-9]+]], 65535
; 32-CMOV-DAG: ori $[[R1]], $[[R1]], 32766
; 32-CMOV-DAG: slt $[[R0:[0-9]+]], $[[R1]], $4
; 32-CMOV-DAG: movn $[[I5]], $[[I3]], $[[R0]]
; 32-CMP-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 32-CMP-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 32-CMP-DAG: lui $[[IMM:[0-9]+]], 65535
; 32-CMP-DAG: ori $[[IMM]], $[[IMM]], 32766
; 32-CMP-DAG: slt $[[R0:[0-9]+]], $[[I32767]], $4
; FIXME: We can do better than this by using selccz to choose between -0 and -2
; 32-CMP-DAG: selnez $[[T0:[0-9]+]], $[[I3]], $[[R0]]
; 32-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 32-CMP-DAG: or $2, $[[T0]], $[[T1]]
; 64-CMOV-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 64-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 64-CMOV-DAG: lui $[[R1:[0-9]+]], 65535
; 64-CMOV-DAG: ori $[[R1]], $[[R1]], 32766
; 64-CMOV-DAG: slt $[[R0:[0-9]+]], $[[R1]], $4
; 64-CMOV-DAG: movn $[[I5]], $[[I3]], $[[R0]]
; 64-CMP-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 64-CMP-DAG: addiu $[[I5:2]], $zero, 5
; 64-CMP-DAG: lui $[[IMM:[0-9]+]], 65535
; 64-CMP-DAG: ori $[[IMM]], $[[IMM]], 32766
; 64-CMP-DAG: slt $[[R0:[0-9]+]], $[[IMM]], $4
; FIXME: We can do better than this by using selccz to choose between -0 and -2
; 64-CMP-DAG: selnez $[[T0:[0-9]+]], $[[I3]], $[[R0]]
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @slti3(i32 %a) {
entry:
%cmp = icmp sgt i32 %a, -32770
%cond = select i1 %cmp, i32 3, i32 5
ret i32 %cond
}
; 64-bit patterns.
; ALL-LABEL: slti64_0:
; 32-CMOV-DAG: slt $[[CC:[0-9]+]], $zero, $4
; 32-CMOV-DAG: addiu $[[I32766:[0-9]+]], $zero, 32766
; 32-CMOV-DAG: sltu $[[R1:[0-9]+]], $[[I32766]], $5
; 32-CMOV-DAG: movz $[[CC:[0-9]+]], $[[R1]], $4
; 32-CMOV-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 32-CMOV-DAG: addiu $[[I4:3]], $zero, 4
; 32-CMOV-DAG: movn $[[I4]], $[[I5]], $[[CC]]
; 32-CMOV-DAG: addiu $2, $zero, 0
; 32-CMP-DAG: slt $[[CC0:[0-9]+]], $zero, $4
; 32-CMP-DAG: addiu $[[I32766:[0-9]+]], $zero, 32766
; 32-CMP-DAG: sltu $[[CC1:[0-9]+]], $[[I32766]], $5
; 32-CMP-DAG: selnez $[[CC2:[0-9]+]], $[[CC0]], $4
; 32-CMP-DAG: seleqz $[[CC3:[0-9]+]], $[[CC1]], $4
; 32-CMP: or $[[CC:[0-9]+]], $[[CC3]], $[[CC2]]
; 32-CMP-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 32-CMP-DAG: addiu $[[I4:[0-9]+]], $zero, 4
; 32-CMP-DAG: seleqz $[[T0:[0-9]+]], $[[I4]], $[[CC]]
; 32-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I5]], $[[CC]]
; 32-CMP-DAG: or $3, $[[T1]], $[[T0]]
; 32-CMP-DAG: addiu $2, $zero, 0
; 64-CMOV-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 64-CMOV-DAG: addiu $[[I4:2]], $zero, 4
; 64-CMOV-DAG: slti $[[R0:[0-9]+]], $4, 32767
; 64-CMOV-DAG: movz $[[I4]], $[[I5]], $[[R0]]
; 64-CMP-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 64-CMP-DAG: addiu $[[I4:[0-9]+]], $zero, 4
; 64-CMP-DAG: slti $[[R0:[0-9]+]], $4, 32767
; FIXME: We can do better than this by adding/subtracting the result of slti
; to/from one of the constants.
; 64-CMP-DAG: seleqz $[[T0:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I4]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i64 @slti64_0(i64 %a) {
entry:
%cmp = icmp sgt i64 %a, 32766
%conv = select i1 %cmp, i64 5, i64 4
ret i64 %conv
}
; ALL-LABEL: slti64_1:
; 32-CMOV-DAG: slt $[[CC:[0-9]+]], $zero, $4
; 32-CMOV-DAG: addiu $[[I32766:[0-9]+]], $zero, 32767
; 32-CMOV-DAG: sltu $[[R1:[0-9]+]], $[[I32766]], $5
; 32-CMOV-DAG: movz $[[CC:[0-9]+]], $[[R1]], $4
; 32-CMOV-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 32-CMOV-DAG: addiu $[[I4:3]], $zero, 4
; 32-CMOV-DAG: movn $[[I4]], $[[I5]], $[[CC]]
; 32-CMOV-DAG: addiu $2, $zero, 0
; 32-CMP-DAG: slt $[[CC0:[0-9]+]], $zero, $4
; 32-CMP-DAG: addiu $[[I32766:[0-9]+]], $zero, 32767
; 32-CMP-DAG: sltu $[[CC1:[0-9]+]], $[[I32766]], $5
; 32-CMP-DAG: selnez $[[CC2:[0-9]+]], $[[CC0]], $4
; 32-CMP-DAG: seleqz $[[CC3:[0-9]+]], $[[CC1]], $4
; 32-CMP: or $[[CC:[0-9]+]], $[[CC3]], $[[CC2]]
; 32-CMP-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 32-CMP-DAG: addiu $[[I4:[0-9]+]], $zero, 4
; 32-CMP-DAG: seleqz $[[T0:[0-9]+]], $[[I4]], $[[CC]]
; 32-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I5]], $[[CC]]
; 32-CMP-DAG: or $3, $[[T1]], $[[T0]]
; 32-CMP-DAG: addiu $2, $zero, 0
; 64-CMOV-DAG: daddiu $[[I5:[0-9]+]], $zero, 5
; 64-CMOV-DAG: daddiu $[[I4:2]], $zero, 4
; 64-CMOV-DAG: daddiu $[[R1:[0-9]+]], $zero, 32767
; 64-CMOV-DAG: slt $[[R0:[0-9]+]], $[[R1]], $4
; 64-CMOV-DAG: movn $[[I4]], $[[I5]], $[[R0]]
; 64-CMP-DAG: daddiu $[[I5:[0-9]+]], $zero, 5
; 64-CMP-DAG: daddiu $[[I4:2]], $zero, 4
; 64-CMP-DAG: daddiu $[[R1:[0-9]+]], $zero, 32767
; 64-CMP-DAG: slt $[[R0:[0-9]+]], $[[R1]], $4
; FIXME: We can do better than this by using selccz to choose between -0 and -2
; 64-CMP-DAG: selnez $[[T0:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[I4]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i64 @slti64_1(i64 %a) {
entry:
%cmp = icmp sgt i64 %a, 32767
%conv = select i1 %cmp, i64 5, i64 4
ret i64 %conv
}
; ALL-LABEL: slti64_2:
; FIXME: The 32-bit versions of this test are too complicated to reasonably
; match at the moment. They do show some missing optimizations though
; such as:
; (movz $a, $b, (neg $c)) -> (movn $a, $b, $c)
; 64-CMOV-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 64-CMOV-DAG: addiu $[[I4:2]], $zero, 4
; 64-CMOV-DAG: slti $[[R0:[0-9]+]], $4, -32768
; 64-CMOV-DAG: movz $[[I4]], $[[I3]], $[[R0]]
; 64-CMP-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 64-CMP-DAG: addiu $[[I4:[0-9]+]], $zero, 4
; 64-CMP-DAG: slti $[[R0:[0-9]+]], $4, -32768
; FIXME: We can do better than this by adding/subtracting the result of slti
; to/from one of the constants.
; 64-CMP-DAG: seleqz $[[T0:[0-9]+]], $[[I3]], $[[R0]]
; 64-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I4]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i64 @slti64_2(i64 %a) {
entry:
%cmp = icmp sgt i64 %a, -32769
%conv = select i1 %cmp, i64 3, i64 4
ret i64 %conv
}
; ALL-LABEL: slti64_3:
; FIXME: The 32-bit versions of this test are too complicated to reasonably
; match at the moment. They do show some missing optimizations though
; such as:
; (movz $a, $b, (neg $c)) -> (movn $a, $b, $c)
; 64-CMOV-DAG: daddiu $[[I5:[0-9]+]], $zero, 5
; 64-CMOV-DAG: daddiu $[[I4:2]], $zero, 4
; 64-CMOV-DAG: daddiu $[[R1:[0-9]+]], ${{[0-9]+}}, 32766
; 64-CMOV-DAG: slt $[[R0:[0-9]+]], $[[R1]], $4
; 64-CMOV-DAG: movn $[[I4]], $[[I5]], $[[R0]]
; 64-CMP-DAG: daddiu $[[I5:[0-9]+]], $zero, 5
; 64-CMP-DAG: daddiu $[[I4:2]], $zero, 4
; 64-CMP-DAG: daddiu $[[R1:[0-9]+]], ${{[0-9]+}}, 32766
; 64-CMP-DAG: slt $[[R0:[0-9]+]], $[[R1]], $4
; FIXME: We can do better than this by using selccz to choose between -0 and -2
; 64-CMP-DAG: selnez $[[T0:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[I4]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i64 @slti64_3(i64 %a) {
entry:
%cmp = icmp sgt i64 %a, -32770
%conv = select i1 %cmp, i64 5, i64 4
ret i64 %conv
}
; sltiu instructions.
; ALL-LABEL: sltiu0:
; 32-CMOV-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 32-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 32-CMOV-DAG: sltiu $[[R0:[0-9]+]], $4, 32767
; 32-CMOV-DAG: movz $[[I5]], $[[I3]], $[[R0]]
; 32-CMP-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 32-CMP-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 32-CMP-DAG: sltiu $[[R0:[0-9]+]], $4, 32767
; FIXME: We can do better than this by using selccz to choose between +0 and +2
; 32-CMP-DAG: seleqz $[[T0:[0-9]+]], $[[I3]], $[[R0]]
; 32-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 32-CMP-DAG: or $2, $[[T0]], $[[T1]]
; 64-CMOV-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 64-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 64-CMOV-DAG: sltiu $[[R0:[0-9]+]], $4, 32767
; 64-CMOV-DAG: movz $[[I5]], $[[I3]], $[[R0]]
; 64-CMP-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 64-CMP-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 64-CMP-DAG: sltiu $[[R0:[0-9]+]], $4, 32767
; FIXME: We can do better than this by using selccz to choose between +0 and +2
; 64-CMP-DAG: seleqz $[[T0:[0-9]+]], $[[I3]], $[[R0]]
; 64-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @sltiu0(i32 %a) {
entry:
%cmp = icmp ugt i32 %a, 32766
%cond = select i1 %cmp, i32 3, i32 5
ret i32 %cond
}
; ALL-LABEL: sltiu1:
; 32-CMOV-DAG: addiu $[[I7:[0-9]+]], $zero, 7
; 32-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 32-CMOV-DAG: addiu $[[R1:[0-9]+]], $zero, 32767
; 32-CMOV-DAG: sltu $[[R0:[0-9]+]], $[[R1]], $4
; 32-CMOV-DAG: movn $[[I5]], $[[I7]], $[[R0]]
; 32-CMP-DAG: addiu $[[I7:[0-9]+]], $zero, 7
; 32-CMP-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 32-CMP-DAG: addiu $[[I32767:[0-9]+]], $zero, 32767
; 32-CMP-DAG: sltu $[[R0:[0-9]+]], $[[I32767]], $4
; FIXME: We can do better than this by using selccz to choose between -0 and -2
; 32-CMP-DAG: selnez $[[T0:[0-9]+]], $[[I7]], $[[R0]]
; 32-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 32-CMP-DAG: or $2, $[[T0]], $[[T1]]
; 64-CMOV-DAG: addiu $[[I7:[0-9]+]], $zero, 7
; 64-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 64-CMOV-DAG: addiu $[[R1:[0-9]+]], $zero, 32767
; 64-CMOV-DAG: sltu $[[R0:[0-9]+]], $[[R1]], $4
; 64-CMOV-DAG: movn $[[I5]], $[[I7]], $[[R0]]
; 64-CMP-DAG: addiu $[[I7:[0-9]+]], $zero, 7
; 64-CMP-DAG: addiu $[[I5:2]], $zero, 5
; 64-CMP-DAG: addiu $[[R1:[0-9]+]], $zero, 32767
; 64-CMP-DAG: sltu $[[R0:[0-9]+]], $[[R1]], $4
; FIXME: We can do better than this by using selccz to choose between -0 and -2
; 64-CMP-DAG: selnez $[[T0:[0-9]+]], $[[I7]], $[[R0]]
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @sltiu1(i32 %a) {
entry:
%cmp = icmp ugt i32 %a, 32767
%cond = select i1 %cmp, i32 7, i32 5
ret i32 %cond
}
; ALL-LABEL: sltiu2:
; 32-CMOV-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 32-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 32-CMOV-DAG: sltiu $[[R0:[0-9]+]], $4, -32768
; 32-CMOV-DAG: movz $[[I5]], $[[I3]], $[[R0]]
; 32-CMP-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 32-CMP-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 32-CMP-DAG: sltiu $[[R0:[0-9]+]], $4, -32768
; FIXME: We can do better than this by using selccz to choose between +0 and +2
; 32-CMP-DAG: seleqz $[[T0:[0-9]+]], $[[I3]], $[[R0]]
; 32-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 32-CMP-DAG: or $2, $[[T0]], $[[T1]]
; 64-CMOV-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 64-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 64-CMOV-DAG: sltiu $[[R0:[0-9]+]], $4, -32768
; 64-CMOV-DAG: movz $[[I5]], $[[I3]], $[[R0]]
; 64-CMP-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 64-CMP-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 64-CMP-DAG: sltiu $[[R0:[0-9]+]], $4, -32768
; FIXME: We can do better than this by using selccz to choose between +0 and +2
; 64-CMP-DAG: seleqz $[[T0:[0-9]+]], $[[I3]], $[[R0]]
; 64-CMP-DAG: selnez $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @sltiu2(i32 %a) {
entry:
%cmp = icmp ugt i32 %a, -32769
%cond = select i1 %cmp, i32 3, i32 5
ret i32 %cond
}
; ALL-LABEL: sltiu3:
; 32-CMOV-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 32-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 32-CMOV-DAG: lui $[[R1:[0-9]+]], 65535
; 32-CMOV-DAG: ori $[[R1]], $[[R1]], 32766
; 32-CMOV-DAG: sltu $[[R0:[0-9]+]], $[[R1]], $4
; 32-CMOV-DAG: movn $[[I5]], $[[I3]], $[[R0]]
; 32-CMP-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 32-CMP-DAG: addiu $[[I5:[0-9]+]], $zero, 5
; 32-CMP-DAG: lui $[[IMM:[0-9]+]], 65535
; 32-CMP-DAG: ori $[[IMM]], $[[IMM]], 32766
; 32-CMP-DAG: sltu $[[R0:[0-9]+]], $[[I32767]], $4
; FIXME: We can do better than this by using selccz to choose between -0 and -2
; 32-CMP-DAG: selnez $[[T0:[0-9]+]], $[[I3]], $[[R0]]
; 32-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 32-CMP-DAG: or $2, $[[T0]], $[[T1]]
; 64-CMOV-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 64-CMOV-DAG: addiu $[[I5:2]], $zero, 5
; 64-CMOV-DAG: lui $[[R1:[0-9]+]], 65535
; 64-CMOV-DAG: ori $[[R1]], $[[R1]], 32766
; 64-CMOV-DAG: sltu $[[R0:[0-9]+]], $[[R1]], $4
; 64-CMOV-DAG: movn $[[I5]], $[[I3]], $[[R0]]
; 64-CMP-DAG: addiu $[[I3:[0-9]+]], $zero, 3
; 64-CMP-DAG: addiu $[[I5:2]], $zero, 5
; 64-CMP-DAG: lui $[[IMM:[0-9]+]], 65535
; 64-CMP-DAG: ori $[[IMM]], $[[IMM]], 32766
; 64-CMP-DAG: sltu $[[R0:[0-9]+]], $[[IMM]], $4
; FIXME: We can do better than this by using selccz to choose between -0 and -2
; 64-CMP-DAG: selnez $[[T0:[0-9]+]], $[[I3]], $[[R0]]
; 64-CMP-DAG: seleqz $[[T1:[0-9]+]], $[[I5]], $[[R0]]
; 64-CMP-DAG: or $2, $[[T0]], $[[T1]]
define i32 @sltiu3(i32 %a) {
entry:
%cmp = icmp ugt i32 %a, -32770
%cond = select i1 %cmp, i32 3, i32 5
ret i32 %cond
}
; Check if
; (select (setxx a, N), x, x-1) or
; (select (setxx a, N), x-1, x)
; doesn't generate conditional moves
; for constant operands whose difference is |1|
define i32 @slti4(i32 %a) nounwind readnone {
%1 = icmp slt i32 %a, 7
%2 = select i1 %1, i32 4, i32 3
ret i32 %2
}
; ALL-LABEL: slti4:
; 32-CMOV-DAG: slti [[R1:\$[0-9]+]], $4, 7
; 32-CMOV-DAG: addiu $2, [[R1]], 3
; 32-CMOV-NOT: movn
; 32-CMP-DAG: slti [[R1:\$[0-9]+]], $4, 7
; 32-CMP-DAG: addiu $2, [[R1]], 3
; 32-CMP-NOT: seleqz
; 32-CMP-NOT: selnez
; 64-CMOV-DAG: slti [[R1:\$[0-9]+]], $4, 7
; 64-CMOV-DAG: addiu $2, [[R1]], 3
; 64-CMOV-NOT: movn
; 64-CMP-DAG: slti [[R1:\$[0-9]+]], $4, 7
; 64-CMP-DAG: addiu $2, [[R1]], 3
; 64-CMP-NOT: seleqz
; 64-CMP-NOT: selnez
define i32 @slti5(i32 %a) nounwind readnone {
%1 = icmp slt i32 %a, 7
%2 = select i1 %1, i32 -3, i32 -4
ret i32 %2
}
; ALL-LABEL: slti5:
; 32-CMOV-DAG: slti [[R1:\$[0-9]+]], $4, 7
; 32-CMOV-DAG: addiu [[R3:\$[0-9]+]], [[R2:\$[a-z0-9]+]], -4
; 32-CMOV-NOT: movn
; 32-CMP-DAG: slti [[R1:\$[0-9]+]], $4, 7
; 32-CMP-DAG: addiu [[R3:\$[0-9]+]], [[R2:\$[a-z0-9]+]], -4
; 32-CMP-NOT: seleqz
; 32-CMP-NOT: selnez
; 64-CMOV-DAG: slti [[R1:\$[0-9]+]], $4, 7
; 64-CMOV-DAG: addiu [[R3:\$[0-9]+]], [[R2:\$[a-z0-9]+]], -4
; 64-CMOV-NOT: movn
; 64-CMP-DAG: slti [[R1:\$[0-9]+]], $4, 7
; 64-CMP-DAG: addiu [[R3:\$[0-9]+]], [[R2:\$[a-z0-9]+]], -4
; 64-CMP-NOT: seleqz
; 64-CMP-NOT: selnez
define i32 @slti6(i32 %a) nounwind readnone {
%1 = icmp slt i32 %a, 7
%2 = select i1 %1, i32 3, i32 4
ret i32 %2
}
; ALL-LABEL: slti6:
; ALL-DAG: addiu [[R1:\$[0-9]+]], $zero, 6
; ALL-DAG: slt [[R1]], [[R1]], $4
; ALL-DAG: addiu [[R2:\$[0-9]+]], [[R1]], 3
; ALL-NOT: movn
; ALL-NOT: seleqz
; ALL-NOT: selnez
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