50c743fa71
Similarly as for pointers, even for integers a == b is usually false. GCC also uses this heuristic. Reviewed By: ebrevnov Differential Revision: https://reviews.llvm.org/D85781
170 lines
4.3 KiB
LLVM
170 lines
4.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; Test 64-bit comparisons in which the second operand is zero-extended
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; from a PC-relative i16.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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@g = global i16 1
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@h = global i16 1, align 1, section "foo"
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; Check unsigned comparison.
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define i64 @f1(i64 %src1) {
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; CHECK-LABEL: f1:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: clghrl %r2, g
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; CHECK-NEXT: jhe .LBB0_2
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; CHECK-NEXT: # %bb.1: # %exit
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; CHECK-NEXT: la %r2, 1(%r2)
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; CHECK-NEXT: br %r14
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; CHECK-NEXT: .LBB0_2: # %mulb
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; CHECK-NEXT: msgr %r2, %r2
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; CHECK-NEXT: la %r2, 1(%r2)
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; CHECK-NEXT: br %r14
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entry:
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%val = load i16, i16 *@g
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%src2 = zext i16 %val to i64
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%cond = icmp ult i64 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i64 %src1, %src1
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br label %exit
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exit:
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%tmp = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
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%res = add i64 %tmp, 1
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ret i64 %res
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}
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; Check signed comparison.
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define i64 @f2(i64 %src1) {
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; CHECK-LABEL: f2:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: llghrl %r0, g
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; CHECK-NEXT: cgrjhe %r2, %r0, .LBB1_2
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; CHECK-NEXT: # %bb.1: # %exit
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; CHECK-NEXT: la %r2, 1(%r2)
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; CHECK-NEXT: br %r14
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; CHECK-NEXT: .LBB1_2: # %mulb
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; CHECK-NEXT: msgr %r2, %r2
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; CHECK-NEXT: la %r2, 1(%r2)
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; CHECK-NEXT: br %r14
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entry:
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%val = load i16, i16 *@g
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%src2 = zext i16 %val to i64
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%cond = icmp slt i64 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i64 %src1, %src1
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br label %exit
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exit:
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%tmp = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
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%res = add i64 %tmp, 1
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ret i64 %res
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}
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; Check equality.
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define i64 @f3(i64 %src1) {
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; CHECK-LABEL: f3:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: clghrl %r2, g
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; CHECK-NEXT: je .LBB2_2
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; CHECK-NEXT: # %bb.1: # %mulb
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; CHECK-NEXT: msgr %r2, %r2
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; CHECK-NEXT: .LBB2_2: # %exit
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; CHECK-NEXT: la %r2, 1(%r2)
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; CHECK-NEXT: br %r14
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entry:
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%val = load i16, i16 *@g
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%src2 = zext i16 %val to i64
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%cond = icmp eq i64 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i64 %src1, %src1
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br label %exit
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exit:
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%tmp = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
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%res = add i64 %tmp, 1
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ret i64 %res
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}
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; Check inequality.
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define i64 @f4(i64 %src1) {
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; CHECK-LABEL: f4:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: clghrl %r2, g
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; CHECK-NEXT: je .LBB3_2
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; CHECK-NEXT: # %bb.1: # %exit
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; CHECK-NEXT: la %r2, 1(%r2)
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; CHECK-NEXT: br %r14
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; CHECK-NEXT: .LBB3_2: # %mulb
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; CHECK-NEXT: msgr %r2, %r2
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; CHECK-NEXT: la %r2, 1(%r2)
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; CHECK-NEXT: br %r14
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entry:
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%val = load i16, i16 *@g
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%src2 = zext i16 %val to i64
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%cond = icmp ne i64 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i64 %src1, %src1
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br label %exit
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exit:
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%tmp = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
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%res = add i64 %tmp, 1
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ret i64 %res
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}
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; Repeat f1 with an unaligned address.
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define i64 @f5(i64 %src1) {
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; CHECK-LABEL: f5:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: lgrl %r1, h@GOT
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; CHECK-NEXT: llgh %r0, 0(%r1)
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; CHECK-NEXT: clgrjhe %r2, %r0, .LBB4_2
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; CHECK-NEXT: # %bb.1: # %exit
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; CHECK-NEXT: la %r2, 1(%r2)
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; CHECK-NEXT: br %r14
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; CHECK-NEXT: .LBB4_2: # %mulb
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; CHECK-NEXT: msgr %r2, %r2
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; CHECK-NEXT: la %r2, 1(%r2)
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; CHECK-NEXT: br %r14
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entry:
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%val = load i16, i16 *@h, align 1
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%src2 = zext i16 %val to i64
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%cond = icmp ult i64 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i64 %src1, %src1
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br label %exit
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exit:
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%tmp = phi i64 [ %src1, %entry ], [ %mul, %mulb ]
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%res = add i64 %tmp, 1
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ret i64 %res
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}
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; Check the comparison can be reversed if that allows CLGHRL to be used.
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define i64 @f6(i64 %src2) {
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; CHECK-LABEL: f6:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: clghrl %r2, g
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; CHECK-NEXT: jle .LBB5_2
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; CHECK-NEXT: # %bb.1: # %exit
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; CHECK-NEXT: la %r2, 1(%r2)
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; CHECK-NEXT: br %r14
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; CHECK-NEXT: .LBB5_2: # %mulb
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; CHECK-NEXT: msgr %r2, %r2
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; CHECK-NEXT: la %r2, 1(%r2)
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; CHECK-NEXT: br %r14
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entry:
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%val = load i16, i16 *@g
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%src1 = zext i16 %val to i64
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%cond = icmp ult i64 %src1, %src2
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br i1 %cond, label %exit, label %mulb
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mulb:
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%mul = mul i64 %src2, %src2
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br label %exit
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exit:
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%tmp = phi i64 [ %src2, %entry ], [ %mul, %mulb ]
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%res = add i64 %tmp, 1
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ret i64 %res
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}
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