Imported Upstream version 5.18.0.205

Former-commit-id: 7f59f7e792705db773f1caecdaa823092f4e2927

external/llvm/test/Transforms/SpeculativeExecution/spec-calls.ll

@@ -0,0 +1,64 @@
+; RUN: opt < %s -S -speculative-execution \
+; RUN:   -spec-exec-max-speculation-cost 4 -spec-exec-max-not-hoisted 3 \
+; RUN:   | FileCheck %s
+
+declare float @llvm.fabs.f32(float) nounwind readnone
+declare i32 @llvm.ctlz.i32(i32, i1) nounwind readnone
+
+declare float @unknown(float)
+declare float @unknown_readnone(float) nounwind readnone
+
+; CHECK-LABEL: @ifThen_fabs(
+; CHECK: call float @llvm.fabs.f32(
+; CHECK: br i1 true
+define void @ifThen_fabs() {
+  br i1 true, label %a, label %b
+
+a:
+  %x = call float @llvm.fabs.f32(float 1.0)
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_ctlz(
+; CHECK: call i32 @llvm.ctlz.i32(
+; CHECK: br i1 true
+define void @ifThen_ctlz() {
+  br i1 true, label %a, label %b
+
+a:
+  %x = call i32 @llvm.ctlz.i32(i32 0, i1 true)
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_call_sideeffects(
+; CHECK: br i1 true
+; CHECK: call float @unknown(
+define void @ifThen_call_sideeffects() {
+  br i1 true, label %a, label %b
+
+a:
+  %x = call float @unknown(float 1.0)
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_call_readnone(
+; CHECK: br i1 true
+; CHECK: call float @unknown_readnone(
+define void @ifThen_call_readnone() {
+  br i1 true, label %a, label %b
+a:
+  %x = call float @unknown_readnone(float 1.0)
+  br label %b
+
+b:
+  ret void
+}

external/llvm/test/Transforms/SpeculativeExecution/spec-casts.ll

@@ -0,0 +1,136 @@
+; RUN: opt < %s -S -speculative-execution \
+; RUN:   -spec-exec-max-speculation-cost 4 -spec-exec-max-not-hoisted 3 \
+; RUN:   | FileCheck %s
+
+; CHECK-LABEL: @ifThen_bitcast(
+; CHECK: bitcast
+; CHECK: br i1 true
+define void @ifThen_bitcast() {
+  br i1 true, label %a, label %b
+
+a:
+  %x = bitcast i32 undef to float
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_ptrtoint(
+; CHECK: ptrtoint
+; CHECK: br i1 true
+define void @ifThen_ptrtoint() {
+  br i1 true, label %a, label %b
+
+a:
+  %x = ptrtoint i32* undef to i64
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_inttoptr(
+; CHECK: inttoptr
+; CHECK: br i1 true
+define void @ifThen_inttoptr() {
+  br i1 true, label %a, label %b
+
+a:
+  %x = inttoptr i64 undef to i32*
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_addrspacecast(
+; CHECK: addrspacecast
+; CHECK: br i1 true
+define void @ifThen_addrspacecast() {
+  br i1 true, label %a, label %b
+a:
+  %x = addrspacecast i32* undef to i32 addrspace(1)*
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_fptoui(
+; CHECK: fptoui
+; CHECK: br i1 true
+define void @ifThen_fptoui() {
+  br i1 true, label %a, label %b
+a:
+  %x = fptoui float undef to i32
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_fptosi(
+; CHECK: fptosi
+; CHECK: br i1 true
+define void @ifThen_fptosi() {
+  br i1 true, label %a, label %b
+a:
+  %x = fptosi float undef to i32
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_uitofp(
+; CHECK: uitofp
+; CHECK: br i1 true
+define void @ifThen_uitofp() {
+  br i1 true, label %a, label %b
+a:
+  %x = uitofp i32 undef to float
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_sitofp(
+; CHECK: sitofp
+; CHECK: br i1 true
+define void @ifThen_sitofp() {
+  br i1 true, label %a, label %b
+a:
+  %x = sitofp i32 undef to float
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_fpext(
+; CHECK: fpext
+; CHECK: br i1 true
+define void @ifThen_fpext() {
+  br i1 true, label %a, label %b
+a:
+  %x = fpext float undef to double
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_fptrunc(
+; CHECK: fptrunc
+; CHECK: br i1 true
+define void @ifThen_fptrunc() {
+  br i1 true, label %a, label %b
+a:
+  %x = fptrunc double undef to float
+  br label %b
+
+b:
+  ret void
+}

external/llvm/test/Transforms/SpeculativeExecution/spec-compares.ll

@@ -0,0 +1,31 @@
+; RUN: opt < %s -S -speculative-execution \
+; RUN:   -spec-exec-max-speculation-cost 4 -spec-exec-max-not-hoisted 3 \
+; RUN:   | FileCheck %s
+
+; CHECK-LABEL: @ifThen_icmp(
+; CHECK: icmp
+; CHECK: br i1 true
+define void @ifThen_icmp() {
+  br i1 true, label %a, label %b
+
+a:
+  %x = icmp eq i32 undef, undef
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_fcmp(
+; CHECK: fcmp
+; CHECK: br i1 true
+define void @ifThen_fcmp() {
+  br i1 true, label %a, label %b
+
+a:
+  %x = fcmp oeq float undef, undef
+  br label %b
+
+b:
+  ret void
+}

external/llvm/test/Transforms/SpeculativeExecution/spec-fp.ll

@@ -0,0 +1,87 @@
+; RUN: opt < %s -S -speculative-execution \
+; RUN:   -spec-exec-max-speculation-cost 4 -spec-exec-max-not-hoisted 3 \
+; RUN:   | FileCheck %s
+
+; CHECK-LABEL: @ifThen_fadd(
+; CHECK: fadd
+; CHECK: br i1 true
+define void @ifThen_fadd() {
+  br i1 true, label %a, label %b
+
+a:
+  %x = fadd float undef, undef
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_fsub(
+; CHECK: fsub
+; CHECK: br i1 true
+define void @ifThen_fsub() {
+  br i1 true, label %a, label %b
+
+a:
+  %x = fsub float undef, undef
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_fneg(
+; CHECK: fsub float -0.0
+; CHECK: br i1 true
+define void @ifThen_fneg() {
+  br i1 true, label %a, label %b
+
+a:
+  %x = fsub float -0.0, undef
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_fmul(
+; CHECK: fmul
+; CHECK: br i1 true
+define void @ifThen_fmul() {
+  br i1 true, label %a, label %b
+
+a:
+  %x = fmul float undef, undef
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_fdiv(
+; CHECK: fdiv
+; CHECK: br i1 true
+define void @ifThen_fdiv() {
+  br i1 true, label %a, label %b
+
+a:
+  %x = fdiv float undef, undef
+  br label %b
+
+b:
+  ret void
+}
+
+; CHECK-LABEL: @ifThen_frem(
+; CHECK: frem
+; CHECK: br i1 true
+define void @ifThen_frem() {
+  br i1 true, label %a, label %b
+
+a:
+  %x = frem float undef, undef
+  br label %b
+
+b:
+  ret void
+}

external/llvm/test/Transforms/SpeculativeExecution/spec.ll

@@ -0,0 +1,198 @@
+; RUN: opt < %s -S -speculative-execution \
+; RUN:   -spec-exec-max-speculation-cost 4 -spec-exec-max-not-hoisted 3 \
+; RUN:   | FileCheck %s
+; RUN: opt < %s -S -passes='speculative-execution' \
+; RUN:   -spec-exec-max-speculation-cost 4 -spec-exec-max-not-hoisted 3 \
+; RUN:   | FileCheck %s
+
+target datalayout = "e-i64:64-v16:16-v32:32-n16:32:64"
+
+; Hoist in if-then pattern.
+define void @ifThen() {
+; CHECK-LABEL: @ifThen(
+; CHECK: %x = add i32 2, 3
+; CHECK: br i1 true
+  br i1 true, label %a, label %b
+; CHECK: a:
+a:
+  %x = add i32 2, 3
+; CHECK: br label
+  br label %b
+; CHECK: b:
+b:
+; CHECK: ret void
+  ret void
+}
+
+; Hoist in if-else pattern.
+define void @ifElse() {
+; CHECK-LABEL: @ifElse(
+; CHECK: %x = add i32 2, 3
+; CHECK: br i1 true
+  br i1 true, label %b, label %a
+; CHECK: a:
+a:
+  %x = add i32 2, 3
+; CHECK: br label
+  br label %b
+; CHECK: b:
+b:
+; CHECK: ret void
+  ret void
+}
+
+; Hoist in if-then-else pattern if it is equivalent to if-then.
+define void @ifElseThenAsIfThen() {
+; CHECK-LABEL: @ifElseThenAsIfThen(
+; CHECK: %x = add i32 2, 3
+; CHECK: br
+  br i1 true, label %a, label %b
+; CHECK: a:
+a:
+  %x = add i32 2, 3
+; CHECK: br label
+  br label %c
+; CHECK: b:
+b:
+  br label %c
+; CHECK: c
+c:
+  ret void
+}
+
+; Hoist in if-then-else pattern if it is equivalent to if-else.
+define void @ifElseThenAsIfElse() {
+; CHECK-LABEL: @ifElseThenAsIfElse(
+; CHECK: %x = add i32 2, 3
+; CHECK: br
+  br i1 true, label %b, label %a
+; CHECK: a:
+a:
+  %x = add i32 2, 3
+; CHECK: br label
+  br label %c
+; CHECK: b:
+b:
+  br label %c
+; CHECK: c
+c:
+  ret void
+}
+
+; Do not hoist if-then-else pattern if it is not equivalent to if-then
+; or if-else.
+define void @ifElseThen() {
+; CHECK-LABEL: @ifElseThen(
+; CHECK: br
+  br i1 true, label %a, label %b
+; CHECK: a:
+a:
+; CHECK: %x = add
+  %x = add i32 2, 3
+; CHECK: br label
+  br label %c
+; CHECK: b:
+b:
+; CHECK: %y = add
+  %y = add i32 2, 3
+  br label %c
+; CHECK: c
+c:
+  ret void
+}
+
+; Do not hoist loads and do not hoist an instruction past a definition of
+; an operand.
+define void @doNotHoistPastDef() {
+; CHECK-LABEL: @doNotHoistPastDef(
+  br i1 true, label %b, label %a
+; CHECK-NOT: load
+; CHECK-NOT: add
+; CHECK: a:
+a:
+; CHECK: %def = load
+  %def = load i32, i32* null
+; CHECK: %use = add
+  %use = add i32 %def, 0
+  br label %b
+; CHECK: b:
+b:
+  ret void
+}
+
+; Case with nothing to speculate.
+define void @nothingToSpeculate() {
+; CHECK-LABEL: @nothingToSpeculate(
+  br i1 true, label %b, label %a
+; CHECK: a:
+a:
+; CHECK: %def = load
+  %def = load i32, i32* null
+  br label %b
+; CHECK: b:
+b:
+  ret void
+}
+
+; Still hoist if an operand is defined before the block or is itself hoisted.
+define void @hoistIfNotPastDef() {
+; CHECK-LABEL: @hoistIfNotPastDef(
+; CHECK: %x = load
+  %x = load i32, i32* null
+; CHECK: %y = add i32 %x, 1
+; CHECK: %z = add i32 %y, 1
+; CHECK: br
+  br i1 true, label %b, label %a
+; CHECK: a:
+a:
+  %y = add i32 %x, 1
+  %z = add i32 %y, 1
+  br label %b
+; CHECK: b:
+b:
+  ret void
+}
+
+; Do not hoist if the speculation cost is too high.
+define void @costTooHigh() {
+; CHECK-LABEL: @costTooHigh(
+; CHECK: br
+  br i1 true, label %b, label %a
+; CHECK: a:
+a:
+; CHECK: %r1 = add
+  %r1 = add i32 1, 1
+; CHECK: %r2 = add
+  %r2 = add i32 1, 1
+; CHECK: %r3 = add
+  %r3 = add i32 1, 1
+; CHECK: %r4 = add
+  %r4 = add i32 1, 1
+; CHECK: %r5 = add
+  %r5 = add i32 1, 1
+  br label %b
+; CHECK: b:
+b:
+  ret void
+}
+
+; Do not hoist if too many instructions are left behind.
+define void @tooMuchLeftBehind() {
+; CHECK-LABEL: @tooMuchLeftBehind(
+; CHECK: br
+  br i1 true, label %b, label %a
+; CHECK: a:
+a:
+; CHECK: %x = load
+  %x = load i32, i32* null
+; CHECK: %r1 = add
+  %r1 = add i32 %x, 1
+; CHECK: %r2 = add
+  %r2 = add i32 %x, 1
+; CHECK: %r3 = add
+  %r3 = add i32 %x, 1
+  br label %b
+; CHECK: b:
+b:
+  ret void
+}