mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-29 13:29:28 +00:00
1c8491ecc7
into unsigned ones when the operands are known to have the same sign bit value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70053 91177308-0d34-0410-b5e6-96231b3b80d8
29 lines
691 B
LLVM
29 lines
691 B
LLVM
; RUN: llvm-as < %s | opt -instcombine | llvm-dis > %t
|
|
; RUN: not grep zext %t
|
|
; RUN: not grep slt %t
|
|
; RUN: grep {icmp ult} %t
|
|
|
|
; Instcombine should convert the zext+slt into a simple ult.
|
|
|
|
define void @foo(double* %p) nounwind {
|
|
entry:
|
|
br label %bb
|
|
|
|
bb:
|
|
%indvar = phi i64 [ 0, %entry ], [ %indvar.next, %bb ]
|
|
%t0 = and i64 %indvar, 65535
|
|
%t1 = getelementptr double* %p, i64 %t0
|
|
%t2 = load double* %t1, align 8
|
|
%t3 = mul double %t2, 2.2
|
|
store double %t3, double* %t1, align 8
|
|
%i.04 = trunc i64 %indvar to i16
|
|
%t4 = add i16 %i.04, 1
|
|
%t5 = zext i16 %t4 to i32
|
|
%t6 = icmp slt i32 %t5, 500
|
|
%indvar.next = add i64 %indvar, 1
|
|
br i1 %t6, label %bb, label %return
|
|
|
|
return:
|
|
ret void
|
|
}
|