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[Test] Clear out br i1 undef from tests to avoid UB 

We don't want to test possible unexpected impact of such
branches. Replacing them with regular conditions. Idea by
Nikita Popov.
This commit is contained in:
Max Kazantsev 2021-06-23 11:33:03 +07:00
parent b7d2c173eb
commit 976926e8ee
1 changed files with 20 additions and 20 deletions
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40
llvm/test/Transforms/LoopDeletion/eval_first_iteration.ll
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@ -655,7 +655,7 @@ failure:
unreachable
}
define i32 @test_multiple_pred_2() {
define i32 @test_multiple_pred_2(i1 %cond, i1 %cond2) {
; CHECK-LABEL: @test_multiple_pred_2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
@ -665,13 +665,13 @@ define i32 @test_multiple_pred_2() {
; CHECK-NEXT: [[IS_POSITIVE:%.*]] = icmp sgt i32 [[SUB]], 0
; CHECK-NEXT: br i1 [[IS_POSITIVE]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
; CHECK: if.true:
; CHECK-NEXT: br i1 undef, label [[IF_TRUE_1:%.*]], label [[IF_TRUE_2:%.*]]
; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_TRUE_1:%.*]], label [[IF_TRUE_2:%.*]]
; CHECK: if.true.1:
; CHECK-NEXT: br label [[BACKEDGE:%.*]]
; CHECK: if.true.2:
; CHECK-NEXT: br label [[BACKEDGE]]
; CHECK: if.false:
; CHECK-NEXT: br i1 undef, label [[IF_FALSE_1:%.*]], label [[IF_FALSE_2:%.*]]
; CHECK-NEXT: br i1 [[COND2:%.*]], label [[IF_FALSE_1:%.*]], label [[IF_FALSE_2:%.*]]
; CHECK: if.false.1:
; CHECK-NEXT: br label [[BACKEDGE]]
; CHECK: if.false.2:
@ -700,7 +700,7 @@ loop: ; preds = %backedge, %entry
br i1 %is.positive, label %if.true, label %if.false
if.true:
br i1 undef, label %if.true.1, label %if.true.2
br i1 %cond, label %if.true.1, label %if.true.2
if.true.1:
br label %backedge
@ -709,7 +709,7 @@ if.true.2:
br label %backedge
if.false: ; preds = %loop
br i1 undef, label %if.false.1, label %if.false.2
br i1 %cond2, label %if.false.1, label %if.false.2
if.false.1:
br label %backedge
@ -732,7 +732,7 @@ failure:
}
; TODO: We can break the backedge here by assuming that undef = sub.
define i32 @test_multiple_pred_undef_1() {
define i32 @test_multiple_pred_undef_1(i1 %cond, i1 %cond2) {
; CHECK-LABEL: @test_multiple_pred_undef_1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
@ -742,13 +742,13 @@ define i32 @test_multiple_pred_undef_1() {
; CHECK-NEXT: [[IS_POSITIVE:%.*]] = icmp sgt i32 [[SUB]], 0
; CHECK-NEXT: br i1 [[IS_POSITIVE]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
; CHECK: if.true:
; CHECK-NEXT: br i1 undef, label [[IF_TRUE_1:%.*]], label [[IF_TRUE_2:%.*]]
; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_TRUE_1:%.*]], label [[IF_TRUE_2:%.*]]
; CHECK: if.true.1:
; CHECK-NEXT: br label [[BACKEDGE]]
; CHECK: if.true.2:
; CHECK-NEXT: br label [[BACKEDGE]]
; CHECK: if.false:
; CHECK-NEXT: br i1 undef, label [[IF_FALSE_1:%.*]], label [[IF_FALSE_2:%.*]]
; CHECK-NEXT: br i1 [[COND2:%.*]], label [[IF_FALSE_1:%.*]], label [[IF_FALSE_2:%.*]]
; CHECK: if.false.1:
; CHECK-NEXT: br label [[BACKEDGE]]
; CHECK: if.false.2:
@ -774,7 +774,7 @@ loop: ; preds = %backedge, %entry
br i1 %is.positive, label %if.true, label %if.false
if.true:
br i1 undef, label %if.true.1, label %if.true.2
br i1 %cond, label %if.true.1, label %if.true.2
if.true.1:
br label %backedge
@ -783,7 +783,7 @@ if.true.2:
br label %backedge
if.false: ; preds = %loop
br i1 undef, label %if.false.1, label %if.false.2
br i1 %cond2, label %if.false.1, label %if.false.2
if.false.1:
br label %backedge
@ -806,7 +806,7 @@ failure:
}
; TODO: We can break the backedge here by assuming that undef = sub.
define i32 @test_multiple_pred_undef_2() {
define i32 @test_multiple_pred_undef_2(i1 %cond, i1 %cond2) {
; CHECK-LABEL: @test_multiple_pred_undef_2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
@ -816,13 +816,13 @@ define i32 @test_multiple_pred_undef_2() {
; CHECK-NEXT: [[IS_POSITIVE:%.*]] = icmp sgt i32 [[SUB]], 0
; CHECK-NEXT: br i1 [[IS_POSITIVE]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
; CHECK: if.true:
; CHECK-NEXT: br i1 undef, label [[IF_TRUE_1:%.*]], label [[IF_TRUE_2:%.*]]
; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_TRUE_1:%.*]], label [[IF_TRUE_2:%.*]]
; CHECK: if.true.1:
; CHECK-NEXT: br label [[BACKEDGE]]
; CHECK: if.true.2:
; CHECK-NEXT: br label [[BACKEDGE]]
; CHECK: if.false:
; CHECK-NEXT: br i1 undef, label [[IF_FALSE_1:%.*]], label [[IF_FALSE_2:%.*]]
; CHECK-NEXT: br i1 [[COND2:%.*]], label [[IF_FALSE_1:%.*]], label [[IF_FALSE_2:%.*]]
; CHECK: if.false.1:
; CHECK-NEXT: br label [[BACKEDGE]]
; CHECK: if.false.2:
@ -848,7 +848,7 @@ loop: ; preds = %backedge, %entry
br i1 %is.positive, label %if.true, label %if.false
if.true:
br i1 undef, label %if.true.1, label %if.true.2
br i1 %cond, label %if.true.1, label %if.true.2
if.true.1:
br label %backedge
@ -857,7 +857,7 @@ if.true.2:
br label %backedge
if.false: ; preds = %loop
br i1 undef, label %if.false.1, label %if.false.2
br i1 %cond2, label %if.false.1, label %if.false.2
if.false.1:
br label %backedge
@ -880,7 +880,7 @@ failure:
}
; TODO: We can break the backedge here by exploiting undef.
define i32 @test_multiple_pred_undef_3() {
define i32 @test_multiple_pred_undef_3(i1 %cond, i1 %cond2) {
; CHECK-LABEL: @test_multiple_pred_undef_3(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
@ -890,13 +890,13 @@ define i32 @test_multiple_pred_undef_3() {
; CHECK-NEXT: [[IS_POSITIVE:%.*]] = icmp sgt i32 [[SUB]], 0
; CHECK-NEXT: br i1 [[IS_POSITIVE]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
; CHECK: if.true:
; CHECK-NEXT: br i1 undef, label [[IF_TRUE_1:%.*]], label [[IF_TRUE_2:%.*]]
; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF_TRUE_1:%.*]], label [[IF_TRUE_2:%.*]]
; CHECK: if.true.1:
; CHECK-NEXT: br label [[BACKEDGE]]
; CHECK: if.true.2:
; CHECK-NEXT: br label [[BACKEDGE]]
; CHECK: if.false:
; CHECK-NEXT: br i1 undef, label [[IF_FALSE_1:%.*]], label [[IF_FALSE_2:%.*]]
; CHECK-NEXT: br i1 [[COND2:%.*]], label [[IF_FALSE_1:%.*]], label [[IF_FALSE_2:%.*]]
; CHECK: if.false.1:
; CHECK-NEXT: br label [[BACKEDGE]]
; CHECK: if.false.2:
@ -922,7 +922,7 @@ loop: ; preds = %backedge, %entry
br i1 %is.positive, label %if.true, label %if.false
if.true:
br i1 undef, label %if.true.1, label %if.true.2
br i1 %cond, label %if.true.1, label %if.true.2
if.true.1:
br label %backedge
@ -931,7 +931,7 @@ if.true.2:
br label %backedge
if.false: ; preds = %loop
br i1 undef, label %if.false.1, label %if.false.2
br i1 %cond2, label %if.false.1, label %if.false.2
if.false.1:
br label %backedge