xref: /llvm-project/llvm/test/Transforms/Inline/simplification-in-loop.ll (revision 6f3f600b2aa10df3b9de580e9fd9457b93e3d087)
1*6f3f600bSNikita Popov; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
2*6f3f600bSNikita Popov; RUN: opt -S -passes=inline < %s | FileCheck %s
3*6f3f600bSNikita Popov
4*6f3f600bSNikita Popov; Make sure the loop condition is not incorrectly simplified during inlinig.
5*6f3f600bSNikita Popovdefine internal i32 @pow(i32 %Base, i32 %Power) {
6*6f3f600bSNikita Popoventry:
7*6f3f600bSNikita Popov  %IsZero = icmp eq i32 %Power, 0
8*6f3f600bSNikita Popov  br i1 %IsZero, label %while.end, label %while.body
9*6f3f600bSNikita Popov
10*6f3f600bSNikita Popovwhile.body:
11*6f3f600bSNikita Popov  %Val = phi i32 [ %mul, %while.body ], [ 1, %entry ]
12*6f3f600bSNikita Popov  %Power.Phi = phi i32 [ %dec, %while.body ], [ %Power, %entry ]
13*6f3f600bSNikita Popov  %dec = add i32 %Power.Phi, -1
14*6f3f600bSNikita Popov  %mul = mul i32 %Val, %Base
15*6f3f600bSNikita Popov  %tobool.not = icmp eq i32 %dec, 0
16*6f3f600bSNikita Popov  br i1 %tobool.not, label %while.end, label %while.body
17*6f3f600bSNikita Popov
18*6f3f600bSNikita Popovwhile.end:
19*6f3f600bSNikita Popov  %Res = phi i32 [ 1, %entry ], [ %mul, %while.body ]
20*6f3f600bSNikita Popov  ret i32 %Res
21*6f3f600bSNikita Popov}
22*6f3f600bSNikita Popov
23*6f3f600bSNikita Popovdefine i32 @caller(i32 %Base, i32 %Power) {
24*6f3f600bSNikita Popov; CHECK-LABEL: define i32 @caller
25*6f3f600bSNikita Popov; CHECK-SAME: (i32 [[BASE:%.*]], i32 [[POWER:%.*]]) {
26*6f3f600bSNikita Popov; CHECK-NEXT:    [[ISZERO_I:%.*]] = icmp eq i32 [[POWER]], 0
27*6f3f600bSNikita Popov; CHECK-NEXT:    br i1 [[ISZERO_I]], label [[POW_EXIT:%.*]], label [[WHILE_BODY_I:%.*]]
28*6f3f600bSNikita Popov; CHECK:       while.body.i:
29*6f3f600bSNikita Popov; CHECK-NEXT:    [[VAL_I:%.*]] = phi i32 [ [[MUL_I:%.*]], [[WHILE_BODY_I]] ], [ 1, [[TMP0:%.*]] ]
30*6f3f600bSNikita Popov; CHECK-NEXT:    [[POWER_PHI_I:%.*]] = phi i32 [ [[DEC_I:%.*]], [[WHILE_BODY_I]] ], [ [[POWER]], [[TMP0]] ]
31*6f3f600bSNikita Popov; CHECK-NEXT:    [[DEC_I]] = add i32 [[POWER_PHI_I]], -1
32*6f3f600bSNikita Popov; CHECK-NEXT:    [[MUL_I]] = mul i32 [[VAL_I]], [[BASE]]
33*6f3f600bSNikita Popov; CHECK-NEXT:    [[TOBOOL_NOT_I:%.*]] = icmp eq i32 [[DEC_I]], 0
34*6f3f600bSNikita Popov; CHECK-NEXT:    br i1 [[TOBOOL_NOT_I]], label [[POW_EXIT]], label [[WHILE_BODY_I]]
35*6f3f600bSNikita Popov; CHECK:       pow.exit:
36*6f3f600bSNikita Popov; CHECK-NEXT:    [[RES_I:%.*]] = phi i32 [ 1, [[TMP0]] ], [ [[MUL_I]], [[WHILE_BODY_I]] ]
37*6f3f600bSNikita Popov; CHECK-NEXT:    ret i32 [[RES_I]]
38*6f3f600bSNikita Popov;
39*6f3f600bSNikita Popov  %res = call i32 @pow(i32 %Base, i32 %Power)
40*6f3f600bSNikita Popov  ret i32 %res
41*6f3f600bSNikita Popov}
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