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[X86] Add cmov i33 sgt test case 

Suggested on D101074 - add a 'icmp sgt i64 %0, -2147483649' comparison that can fold to 'icmp sge i64 %0, -2147483648' on D101074 allowing i32 immediate folding
This commit is contained in:
Simon Pilgrim 2021-06-29 14:36:20 +01:00
parent 9dde514162
commit f0d6c9156b
1 changed files with 13 additions and 0 deletions
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13
llvm/test/CodeGen/X86/cmov.ll
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@ -198,6 +198,19 @@ define i8 @test7(i1 inreg %c, i8 inreg %a, i8 inreg %b) nounwind {
ret i8 %d
}
define i64 @test8(i64 %0, i64 %1, i64 %2) {
; CHECK-LABEL: test8:
; CHECK: # %bb.0:
; CHECK-NEXT: movq %rsi, %rax
; CHECK-NEXT: movabsq $-2147483649, %rcx # imm = 0xFFFFFFFF7FFFFFFF
; CHECK-NEXT: cmpq %rcx, %rdi
; CHECK-NEXT: cmovleq %rdx, %rax
; CHECK-NEXT: retq
%4 = icmp sgt i64 %0, -2147483649
%5 = select i1 %4, i64 %1, i64 %2
ret i64 %5
}
define i32 @smin(i32 %x) {
; CHECK-LABEL: smin:
; CHECK: # %bb.0: